diff --git a/src/Mod/Ship/CMakeLists.txt b/src/Mod/Ship/CMakeLists.txt
index a362a0c6a..a3c14ce96 100644
--- a/src/Mod/Ship/CMakeLists.txt
+++ b/src/Mod/Ship/CMakeLists.txt
@@ -33,6 +33,9 @@ SET(ShipIcons_SRCS
 	Icons/ReparametrizeIco.xpm
 	Icons/Ship.xcf
 	Icons/Ship.xpm
+	Icons/Weight.png
+	Icons/Weight.xcf
+	Icons/Weight.xpm
 	Icons/Tank.png
 	Icons/Tank.xcf
 	Icons/Tank.xpm
@@ -96,6 +99,13 @@ SET(ShipUtils_SRCS
 )
 SOURCE_GROUP("shiputils" FILES ${ShipUtils_SRCS})
 
+SET(ShipWeights_SRCS
+	tankWeights/__init__.py
+	tankWeights/TaskPanel.py
+	tankWeights/TaskPanel.ui
+)
+SOURCE_GROUP("shipweights" FILES ${ShipWeights_SRCS})
+
 SET(ShipCreateTank_SRCS
 	tankCreateTank/__init__.py
 	tankCreateTank/TaskPanel.py
@@ -103,7 +113,7 @@ SET(ShipCreateTank_SRCS
 )
 SOURCE_GROUP("shipcreatetank" FILES ${ShipCreateTank_SRCS})
 
-SET(all_files ${ShipMain_SRCS} ${ShipIcons_SRCS} ${ShipExamples_SRCS} ${ShipLoadExample_SRCS} ${ShipCreateShip_SRCS} ${ShipOutlineDraw_SRCS} ${ShipAreasCurve_SRCS} ${ShipHydrostatics_SRCS} ${ShipUtils_SRCS} ${ShipCreateTank_SRCS})
+SET(all_files ${ShipMain_SRCS} ${ShipIcons_SRCS} ${ShipExamples_SRCS} ${ShipLoadExample_SRCS} ${ShipCreateShip_SRCS} ${ShipOutlineDraw_SRCS} ${ShipAreasCurve_SRCS} ${ShipHydrostatics_SRCS} ${ShipUtils_SRCS} ${ShipWeights_SRCS} ${ShipCreateTank_SRCS})
 
 ADD_CUSTOM_TARGET(Ship ALL
     SOURCES ${all_files}
@@ -159,6 +169,12 @@ INSTALL(
     DESTINATION
         Mod/Ship/shipUtils
 )
+INSTALL(
+    FILES
+        ${ShipWeights_SRCS}
+    DESTINATION
+        Mod/Ship/tankWeights
+)
 INSTALL(
     FILES
         ${ShipCreateTank_SRCS}
diff --git a/src/Mod/Ship/Icons/Weight.png b/src/Mod/Ship/Icons/Weight.png
new file mode 100644
index 000000000..b613fa569
Binary files /dev/null and b/src/Mod/Ship/Icons/Weight.png differ
diff --git a/src/Mod/Ship/Icons/Weight.xcf b/src/Mod/Ship/Icons/Weight.xcf
new file mode 100644
index 000000000..e10ea8e99
Binary files /dev/null and b/src/Mod/Ship/Icons/Weight.xcf differ
diff --git a/src/Mod/Ship/Icons/Weight.xpm b/src/Mod/Ship/Icons/Weight.xpm
new file mode 100644
index 000000000..7d17453db
--- /dev/null
+++ b/src/Mod/Ship/Icons/Weight.xpm
@@ -0,0 +1,721 @@
+/* XPM */
+static char * Weight_xpm[] = {
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+"                                                                                                                  - - ; > , ' ) ! ~ { ] ] ^                                                                                                                     ",
+"                                                                                                                / ( _ : < [ < } } | | 1 2 3 3                                                                                                                   ",
+"                                                                                                              4 4 5 } 6 | |       7 7 8 9 0 a b                                                                                                                 ",
+"                                                                                                            3 c d e 7 7               f ) g h i j                                                                                                               ",
+"                                                                                                            k k l m n                   o p q r s                                                                                                               ",
+"                                                                                                          t u v ) w                       x y z A B                                                                                                             ",
+"                                                                                                          C s D o E                       F G H I J                                                                                                             ",
+"                                                                                                          K A l x                           L M N O                                                                                                             ",
+"                                                                                                          P P Q R                           S 1 T U                                                                                                             ",
+"                                                                                                          V V H L W                       X X Y Z `                                                                                                             ",
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+"                      :.:.F#p#q#q#q#A#s#J#s#X#:.:.|.L#Y#5 %$7#7#7# $`#]#c@c@c@c@c@c@c$-$-$-$>$;$;$c@c@c@c@c@c@!.!.!.}$v v c@c@c@c@c@c@c@c@c@c@c@h c@c@c@c@c@c@r$U#U#~@u$O#O#N#E$A$A$c@c@c@c@c@c@2 _ _ 1.J$J$/.K$h#J+J+L$'.(.M$N$%.O$%.l +@                      ",
+"                      z#V#z#$$W#X#r#:.:.Q#e#Q#R#Z#%$7#S#'$]#]#]#]#=#{#=#c@c@c@c@c@c@W@;$;$+.a.a.5$c@c@c@c@c@c@v u@1$1$k@k@d$c@c@c@c@c@c@c@c@c@<@P$c@c@c@c@c@c@z$O#v$b.A$A$A$B$B$8.8.c@c@c@c@c@c@Q$K$J+R$J+J+B+L$'.(.(.%.O$%.S$T$-#-#` H+!                       ",
+"                    p#F#w#:.:.:.Y#e#Z#Z#7#7#7#`#&$]#]#T#b$=#=#c$-$*#-$!$c@c@c@c@c@c@a.].]$]$!.E@}$9$c@c@c@c@c@c@e$f$f$f$f$i$h h c@c@c@c@c@s$U#U#u$c@c@c@c@c@c@A$ @6. @8.{ 2 U$_ _ _ c@c@c@c@c@c@B+J+_.(.A+A+^#%.%.%.%.S$` *.-#Y@Y@U V$#.q+E+                    ",
+"                    v#9.e#5 e#7#7#S#3$]#]#]#*$=$b$4$&#-$-$-$:$_$;$;$<$<${$a.].]$!.!.!.z v 8$v 8$x$k@k@d$j@f$f$p$f$h l$m$d <@<@:@U#t$u$W$O#O#O#v$v$c@c@c@c@c@c@{ { G$_ _ _ /./.h#X$^.^.8#(.,.(.(.A+%.%.Y$Z$S$-#-#*.Z Y@Y@U U  . .`$`$[+[+e+o+                    ",
+"                  c#5#6#7#`#]#]#=$=$w$=#c$=#-$4$-$_$X@;$;${$a.{$a.a.a.6$!.h$7$}$2$2$k@k@k@n$/$f$f$f$k$k$h h q$m$<@P$r$U#U#U#U#u$O#O#c.E$A$E#7. @7.c@c@c@c@c@c@J$ %/./.X$J+J+_.B+(.(.A+M$^#%.%.S$S$-#-#*.&.Z Y@U  . ....%+%[+[+@%#%#%J $%U+8+8+                  ",
+"                  2#!#*$b$w$=#.$-$-$-$W@-$;$;$;${${$a.a.!.!.!.h$h$9$v v 2$2$1$e$k@k@j@p$h ,$h h l$h <@<@<@U#s$U#U#W$W$O#c@c@c@c@c@c@8.E#8.2 8._ c@c@c@c@c@c@R$g#J+_.8#,.(.A+M$%.A+%%S$-#-#-#` Y@Y@Y@V$ .9+ .[+`$.%[+[+N J J I &%,+P P P *%<+<+                  ",
+"                  ~ )#-$-$-$:$_$>$;$g$g$+.a.a.6$5$!.!.E@7$v v |$|$k@k@k@f$/$f$k$h k$h @$l$<@<@:@<@r$U#~@u$z$)@O#b.A$E$C$c@c@c@c@c@c@c@S+1.S+Q$c@c@c@c@c@c@c@L$(.(.N$%.%.%.Z$).-#-#=%*.Y@Y@U -% . . .[++%O V ;%J J J v@P W.>%A A A ,%'%V.K :+3+                  ",
+"                )###,#;$;$g$a.+.a.a.[$a.!.h$9$E@v 8$v x$x$n$e$/$f$f$i$0@k$h q$q$d <@H$t$U#U#~@U#!@O#v$&@A$b.7.6.7.8.8.F$8.c@c@c@c@c@c@c@c@c@c@c@c@c@c@c@c@O$%.S$Y$-#-#=%` )%Y@!%9+T T  ..%P@[+N ;%O J J '+$%I P P B A A a@b@~%K r s s s F.2+=@_+                ",
+"                Y Y a.a.a.5$!.]$E@z z v u@u@k@x$k@e$f$f$j$f$h 0@h h d <@<@<@H$U#U#U#u$O#O#N#A$E$A$A$C$A$8.8.U$_ _ > > _ /./.c@c@c@c@c@c@c@c@c@c@c@c@c@c@c@-#Z )%&.Y@Y@T !% . .{%+%[+[+N V @%I $%,+&%P W.P A A A ,%K K G.]%s s s x.j j j u w.E E                 ",
+"                S@M@!.E@}$v v v 8$1$k@k@k@e$f$f$j$h k$h y$q$<@<@U#r$U#U#u$U#O#v$E$N#b.A$B$ @8.8.{ I$U$2 >  %S+Q$h#/.g#J+,.J+,.c@c@c@c@c@c@c@c@c@c@c@c@` Y@!%!%T  . .`$[+[+N O J J J $%I P P P P A A A ,%'%K s H.H.s ^%/%^%j t u t u.u.(%b a S.L+                ",
+"              D K@C@v u@k@k@k@j@f$/$f$f$h h h d d <@<@P$:@H$u$U#!@z$O#&@O#c.A$E#6.8.8.F$F$G$_ _  %> /.X$/.^.J+J+_.J+(.(.(.A+^#%.Y$c@c@c@c@c@c@c@c@T  . .P@P@{%[+O N N J J $%P ,+B _%*%_%,%b@,%K K K H.s s s j j j i *@u.u.k :%(%a r.3 c s.3 ) R.1+              ",
+"              2.s@k@e$j@j@p$f$p$h h q$<@<@<@s$t$t$U#U#W$O#O#c.A$A$A$A$ @7.8.{ { I$_ Q$J$> /./.g#J+J+J+J+8#(.(.M$A+%.%.S$T$-#-#*.)%Y@Y@U Y@-% .+%{%+%[+[+;%@%J $%&%P P X.X._%A A A V.,%K <%C C s /%s ^%u j u.u.u.u.a :%r.r.E.3 3 p.p.[%m.m.m.] 9 ^+              ",
+"            z@i@H@,$j$h @$m$d <@<@P$U#U#)@U#u$O#E$b.b.A$A$6.C$7.8.G$I$_ _ _ S+Q$/.K$R$^.J+'.(._.(.(.(.O$O$%.%.-#-#-#-#-#)%V$Y@T -% . . .{%[+N N J J J v@,+P _%>%X.B A '%A K G.G.<%r s /%{@j j j v.*@u.t.t.r.r.}%E.|%3 1%o.p.m.2%m.] 3%] / j.j.#+| |             ",
+"            9@9@h l$<@<@t$H$U#u$W$O#O#O#O#A$b.A$E# @8.8.8.I$_ _ /.S+1./.R$/.J+J+L$8#(.(.(.^#A+%.S$Z$%%-#*.-#)%=%Y@T V$-% ...`$+%[+O J J J '+&%J P P X._%A A V.A K K ]%C r ^%{@^%j j v.*@w.u.u.:%t.r.r.c q.3 1%1%3 m.4 ] 4 ] ] / * * * A.& & f.& < ++            ",
+"            4%6@H$U#!@z$W$O#O#b.c.A$A$C$7.7.8.I$U$G$_ /.1.1././.R$^.J+_._.'.(.(.^#A+%.%.Z$T$-#-#=%)%Y@Y@T T  . .`$`$+%[+[+O @%J ,+&%P P P W._%A A A K K K K G.s ^%F.s j u u j u u.k b r.|%s.s.3 3 [%p.[%m.m.] ^ ] ] k.( * = * - & $ % z.+ + # + .+.+            ",
+"          _@(@(@O#E$E$A$A$6.8.C$8.8.8._ _ _ S+S+/././.X$X$J+J+(.L$(.(.N$M$%.%.%%%%-#-#Y@)%Z 9+Y@ . . .`$+%[+O N O #%J J v@$%P P A *%A V.,%~%a@K K s s ^%^%5%/%i u.*@u.u.b r.r.r.|%3 s.3 3 1%m.m.m.] m.] 6%] * * i.- - - & + 7%+ + + y.. . . . . a+I.I.          ",
+"          =.=.A$A$B$8. @I$F$G$G$_ S+ %/./.^.J+^.8#J+B+(.(.O$A+%.%.Y$%.T$-#-#=%Y@Y@!%-%U  . ...[++%[+O @%J J '+P v@P W.B _%A A ,%,%K K <%s s {@{@^%j v.i t u.u.t.a r.r.r.E.E.3 o.D.m.m.C.l.3%] ( / j.* = A.& & g.g.z.+ d.y.. . . . . . . . . . . . I.I.          ",
+"        >@>@>@8.8._ G$> > _ S+R$g#^.J+J+8#_.(.(.N$^#O$%.T$-#-#-#-#=%Y@Y@Y@!%9+ .[+P@..[+[+O J J J ,+$%P P B W.*%A ~%K K K <%s <%s F.5%/%j u v.u.w.u.k t.r.r.3 }%3 [%D.1%m.m.4 C.2%] ] ( 6%* A.- & & & + + + d.0+y.. . . . . . . . . . . . . . . . I.I.I.        ",
+"        1 1 _ J$/.J$/.R$J+R$J+8#_.(.(.M$O$O$%.Y$S$T$=%-#Z &.Y@Y@ .T  ...`$[+[+N [+N J I '+v@P P W._%A A ,%A K ]%K C s s s s /%j v.w.j u.u.k :%r.|%r.q.3 3 3 n.m.m.2%C.] ] / B.* * * A.h.& z.+ + + 0++ 0+0+. . . . . . . . . . . . . . . . . . . . . I.I.        ",
+"        : 3.R$K$J+J+(.L$(.A+N$N$%.%.Y$-#T$-#&.&.` Y@-%V$ . ...+%{%[+N [+J J ,+&%P P P P A A A A K K K K G.s s x.F.5%j j w.u.u.a u.r.r.r.3 q.c 1%1%o.m.m.2%C.] ] ] k.6%* = & ; & $ f.f.d.@ d.. . . . . . . . . . . . . . . . . . . . . . . . . . . . I.I.        ",
+"        |@d@8#(.(.A+^#%.Y$-#-#-#-#*.&.Y@Y@Y@9+9+ .+%+%[+[+[+[+#%J J v@P P W.*%_%A A a@'%K K H.C <%x.F.5%j j i i *@u.:%b r.r.r.}%3 3 3 [%o.o.2%m.^ ^ ] / 6%j.= h.= h.& & f.+ + + y.y.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I.I.        ",
+"        Q+[.l %.Y$Y$-#-#-#&.Z !%V$9+ . . . ..%[+V [+J J J v@J P P X._%A A a@V.~%]%K r s s s {@j j j i u.u.u.k (%r.}%|%c 3 1%p.3 m.^ C.] ] ] * * j.h.- ; & % 7%f.+ + + e.e.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I.I.I.        ",
+"          ! ! -#)%Y@V$V$9+ . ...{%[+O [+@%J J '+I $%P P P A B A ~%b@V.<%r C s s s /%j j *@w.i u.u.k r.r.r.3 3 3 3 D.m.m.] 3%] ] 6%k.* * * = h.& & g.f.+ + y.# d.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I.I.          ",
+"          #.#.E+U  ..%[+{%[+V @%[+J J v@v@P B W.*%A V.a@'%K r <%C H.s /%j j j i *@u.u.k b t.r.q.|%|%3 3 n.1%4 m.3%] ] j.B.j.* * * & & & g.+ f.+ . # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I.I.I.          ",
+"            f+x+@.@.N+d+N+8+u+5+u+L L l+l+<+:+:+F >+>+>+2+2+x x c+(+E E T.E b+S.g S.g ) ) f n m m m 8 $+^+7 i+e 7 | | ~+K+K+++}+[ }+N.N.K.`.K.Z.K.8%I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.            ",
+"              8+8+5+L L L <+D+:+4+F .@:+>+>+>+9%x x T+U.E U.E b+b+S.S.g w ) ) f R.n m m m ^+7 8 7 7 ]+Q.| | P.h+} < N.}+N.N.)+ +)+K.Z.Y.8%I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.I.              ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                ",
+"                                                                                                                                                                                                                                                                "};
diff --git a/src/Mod/Ship/InitGui.py b/src/Mod/Ship/InitGui.py
index 05dbfecb5..6cf4c9689 100644
--- a/src/Mod/Ship/InitGui.py
+++ b/src/Mod/Ship/InitGui.py
@@ -34,13 +34,13 @@ class ShipWorkbench ( Workbench ):
         # ToolBar
         list = ["Ship_LoadExample", "Ship_CreateShip", "Ship_OutlineDraw", "Ship_AreasCurve", "Ship_Hydrostatics"]
         self.appendToolbar("Ship design",list)
-        list = ["Ship_CreateTank"]
+        list = ["Ship_Weights", "Ship_CreateTank"]
         self.appendToolbar("Loading",list)
         
         # Menu
         list = ["Ship_LoadExample", "Ship_CreateShip", "Ship_OutlineDraw", "Ship_AreasCurve", "Ship_Hydrostatics"]
         self.appendMenu("Ship design",list)
-        list = ["Ship_CreateTank"]
+        list = ["Ship_Weights", "Ship_CreateTank"]
         self.appendToolbar("Loading",list)
 
 Gui.addWorkbench(ShipWorkbench())
diff --git a/src/Mod/Ship/Instance.py b/src/Mod/Ship/Instance.py
index 16d77f868..adba4d22b 100644
--- a/src/Mod/Ship/Instance.py
+++ b/src/Mod/Ship/Instance.py
@@ -663,7 +663,7 @@ class ViewProviderShip:
 def sections(obj):
     """ Returns the discretization points of sections, with the advantage 
     that is a list of nSections lists, with the points.
-    @param Ship object
+    @param obj Ship object
     @return Sections points
     """
     histogram = obj.nPoints[:]
@@ -674,3 +674,42 @@ def sections(obj):
         for j in range(histogram[i],histogram[i+1]):
             sections[i].append(points[j])
     return sections
+
+def weights(obj):
+    """ Returns Ship weights list. If weights has not been sets, 
+    this tool creates it.
+    @param obj Ship object
+    @return Weights list. None if errors
+    """
+    # Test if is a ship instance
+    props = obj.PropertiesList
+    try:
+        props.index("IsShip")
+    except ValueError:
+        return None
+    if not obj.IsShip:
+        return None
+    # Test if properties already exist
+    try:
+        props.index("WeightNames")
+    except ValueError:
+        obj.addProperty("App::PropertyStringList","WeightNames","Ship", str(Translator.translate("Ship Weights names"))).WeightNames=[Translator.translate("Lightweight").__str__()]
+    try:
+        props.index("WeightMass")
+    except ValueError:
+        # Compute mass aproximation
+        from shipHydrostatics import Tools
+        disp = Tools.Displacement(obj,obj.Draft,0.0)
+        obj.addProperty("App::PropertyFloatList","WeightMass","Ship", str(Translator.translate("Ship Weights masses"))).WeightMass=[1000.0 * disp[1]]
+    try:
+        props.index("WeightPos")
+    except ValueError:
+        # Compute mass aproximation
+        from shipHydrostatics import Tools
+        disp = Tools.Displacement(obj,obj.Draft,0.0)
+        obj.addProperty("App::PropertyVectorList","WeightPos","Ship", str(Translator.translate("Ship Weights centers of gravity"))).WeightPos=[Vector(disp[2],0.0,obj.Draft)]
+    # Setup list
+    weights = []
+    for i in range(0,len(obj.WeightNames)):
+        weights.append([obj.WeightNames[i], obj.WeightMass[i], obj.WeightPos[i]])
+    return weights
diff --git a/src/Mod/Ship/Makefile.am b/src/Mod/Ship/Makefile.am
index 0251da41d..35c1957b7 100644
--- a/src/Mod/Ship/Makefile.am
+++ b/src/Mod/Ship/Makefile.am
@@ -34,6 +34,9 @@ nobase_data_DATA = \
 	Icons/ReparametrizeIco.xpm \
 	Icons/Ship.xcf \
 	Icons/Ship.xpm \
+	Icons/Weight.png \
+	Icons/Weight.xcf \
+	Icons/Weight.xpm \
 	Icons/Tank.png \
 	Icons/Tank.xcf \
 	Icons/Tank.xpm \
@@ -66,6 +69,9 @@ nobase_data_DATA = \
 	shipUtils/Math.py \
 	shipUtils/Paths.py \
 	shipUtils/Translator.py \
+	tankWeights/__init__.py \
+	tankWeights/TaskPanel.py \
+	tankWeights/TaskPanel.ui \
 	tankCreateTank/__init__.py \
 	tankCreateTank/TaskPanel.py \
 	tankCreateTank/TaskPanel.ui
diff --git a/src/Mod/Ship/ShipGui.py b/src/Mod/Ship/ShipGui.py
index f62bebfb4..71a9e75e4 100644
--- a/src/Mod/Ship/ShipGui.py
+++ b/src/Mod/Ship/ShipGui.py
@@ -84,6 +84,18 @@ class Hydrostatics:
         ToolTip  = str(Translator.translate('Plot ship hydrostatics'))
         return {'Pixmap' : IconPath, 'MenuText': MenuText, 'ToolTip': ToolTip} 
       
+class SetWeights: 
+    def Activated(self):
+        import tankWeights
+        tankWeights.load()
+
+    def GetResources(self):
+        from shipUtils import Paths, Translator
+        IconPath = Paths.iconsPath() + "/Weight.png"
+        MenuText = str(Translator.translate('Set ship weights'))
+        ToolTip  = str(Translator.translate('Set ship weights, tanks must be added later'))
+        return {'Pixmap' : IconPath, 'MenuText': MenuText, 'ToolTip': ToolTip} 
+
 class CreateTank: 
     def Activated(self):
         import tankCreateTank
@@ -101,4 +113,5 @@ FreeCADGui.addCommand('Ship_CreateShip', CreateShip())
 FreeCADGui.addCommand('Ship_OutlineDraw', OutlineDraw())
 FreeCADGui.addCommand('Ship_AreasCurve', AreasCurve())
 FreeCADGui.addCommand('Ship_Hydrostatics', Hydrostatics())
+FreeCADGui.addCommand('Ship_Weights', SetWeights())
 FreeCADGui.addCommand('Ship_CreateTank', CreateTank())
diff --git a/src/Mod/Ship/shipHydrostatics/Tools.py b/src/Mod/Ship/shipHydrostatics/Tools.py
index a2b1f2c65..3db003957 100644
--- a/src/Mod/Ship/shipHydrostatics/Tools.py
+++ b/src/Mod/Ship/shipHydrostatics/Tools.py
@@ -116,7 +116,7 @@ def Displacement(ship, draft, trim):
     @param ship Selected ship instance
     @param draft Draft.
     @param trim Trim in degrees.
-    @return [areas,disp,xcb]: \n
+    @return [areas,disp,xcb,Cb]: \n
     areas : Area of each section \n
     disp: Ship displacement \n
     xcb: X bouyance center coordinate
diff --git a/src/Mod/Ship/tankWeights/TaskPanel.py b/src/Mod/Ship/tankWeights/TaskPanel.py
new file mode 100644
index 000000000..14cda21e5
--- /dev/null
+++ b/src/Mod/Ship/tankWeights/TaskPanel.py
@@ -0,0 +1,212 @@
+#***************************************************************************
+#*                                                                         *
+#*   Copyright (c) 2011, 2012                                              *  
+#*   Jose Luis Cercos Pita <jlcercos@gmail.com>                            *  
+#*                                                                         *
+#*   This program is free software; you can redistribute it and/or modify  *
+#*   it under the terms of the GNU Lesser General Public License (LGPL)    *
+#*   as published by the Free Software Foundation; either version 2 of     *
+#*   the License, or (at your option) any later version.                   *
+#*   for detail see the LICENCE text file.                                 *
+#*                                                                         *
+#*   This program is distributed in the hope that it will be useful,       *
+#*   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+#*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+#*   GNU Library General Public License for more details.                  *
+#*                                                                         *
+#*   You should have received a copy of the GNU Library General Public     *
+#*   License along with this program; if not, write to the Free Software   *
+#*   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  *
+#*   USA                                                                   *
+#*                                                                         *
+#***************************************************************************
+
+# FreeCAD modules
+import FreeCAD as App
+import FreeCADGui as Gui
+# Qt library
+from PyQt4 import QtGui,QtCore
+# Module
+from Instance import *
+from shipUtils import Paths, Translator
+
+class TaskPanel:
+    def __init__(self):
+        self.ui = Paths.modulePath() + "/tankWeights/TaskPanel.ui"
+        self.ship = None
+
+    def accept(self):
+        if not self.ship:
+            return False
+        # Setup lists
+        name  = []
+        mass  = []
+        pos   = []
+        for i in range(0,self.form.weights.rowCount() - 1):
+            item = self.form.weights.item(i,0)
+            name.append(item.text().__str__())
+            item = self.form.weights.item(i,1)
+            mass.append(item.text().toFloat()[0])
+            vec  = []
+            item = self.form.weights.item(i,2)
+            vec.append(item.text().toFloat()[0])
+            item = self.form.weights.item(i,3)
+            vec.append(item.text().toFloat()[0])
+            item = self.form.weights.item(i,4)
+            vec.append(item.text().toFloat()[0])
+            pos.append(App.Base.Vector(vec[0],vec[1],vec[2]))
+        # Send to ship
+        self.ship.WeightNames = name[:]
+        self.ship.WeightMass  = mass[:]
+        self.ship.WeightPos   = pos[:]
+        return True
+
+    def reject(self):
+        if not self.ship:
+            return False
+        return True
+
+    def clicked(self, index):
+        pass
+
+    def open(self):
+        pass
+
+    def needsFullSpace(self):
+        return True
+
+    def isAllowedAlterSelection(self):
+        return False
+
+    def isAllowedAlterView(self):
+        return True
+
+    def isAllowedAlterDocument(self):
+        return False
+
+    def helpRequested(self):
+        pass
+
+    def setupUi(self):
+        mw = self.getMainWindow()
+        form = mw.findChild(QtGui.QWidget, "TaskPanel")
+        form.weights = form.findChild(QtGui.QTableWidget, "Weights")
+        self.form = form
+        # Initial values
+        if self.initValues():
+            return True
+        self.retranslateUi()
+        # Connect Signals and Slots
+        QtCore.QObject.connect(form.weights,QtCore.SIGNAL("cellChanged(int,int)"),self.onTableItem);
+
+    def getMainWindow(self):
+        "returns the main window"
+        # using QtGui.qApp.activeWindow() isn't very reliable because if another
+        # widget than the mainwindow is active (e.g. a dialog) the wrong widget is
+        # returned
+        toplevel = QtGui.qApp.topLevelWidgets()
+        for i in toplevel:
+            if i.metaObject().className() == "Gui::MainWindow":
+                return i
+        raise Exception("No main window found")
+
+    def initValues(self):
+        """ Get selected geometry.
+        @return False if sucessfully values initialized.
+        """
+        # Get selected objects
+        selObjs  = FreeCADGui.Selection.getSelection()
+        if not selObjs:
+            msg = Translator.translate("Ship instance must be selected (no object selected)\n")
+            App.Console.PrintError(msg)
+            return True
+        for i in range(0,len(selObjs)):
+            obj = selObjs[i]
+            # Test if is a ship instance
+            props = obj.PropertiesList
+            try:
+                props.index("IsShip")
+            except ValueError:
+                continue
+            if obj.IsShip:
+                # Test if another ship already selected
+                if self.ship:
+                    msg = Translator.translate("More than one ship selected (extra ship will be neglected)\n")
+                    App.Console.PrintWarning(msg)
+                    break
+                self.ship = obj
+        # Test if any valid ship was selected
+        if not self.ship:
+            msg = Translator.translate("Ship instance must be selected (no valid ship found at selected objects)\n")
+            App.Console.PrintError(msg)
+            return True
+        # Get weights
+        w = weights(self.ship)
+        # Set the items
+        self.form.weights.setRowCount(len(w)+1)
+        for i in range(0,len(w)):
+            item = QtGui.QTableWidgetItem(w[i][0])
+            self.form.weights.setItem(i,0,item)
+            string = '%g' % (w[i][1])
+            item = QtGui.QTableWidgetItem(string)
+            self.form.weights.setItem(i,1,item)
+            string = '%g' % (w[i][2].x)
+            item = QtGui.QTableWidgetItem(string)
+            self.form.weights.setItem(i,2,item)
+            string = '%g' % (w[i][2].y)
+            item = QtGui.QTableWidgetItem(string)
+            self.form.weights.setItem(i,3,item)
+            string = '%g' % (w[i][2].z)
+            item = QtGui.QTableWidgetItem(string)
+            self.form.weights.setItem(i,4,item)
+        msg = Translator.translate("Ready to work\n")
+        App.Console.PrintMessage(msg)
+        return False
+
+    def retranslateUi(self):
+        """ Set user interface locale strings. 
+        """
+        self.form.setWindowTitle(Translator.translate("Set weights"))
+        labels = []
+        labels.append(Translator.translate("Name"))
+        labels.append(Translator.translate("Mass") + " [kg]")        
+        labels.append(QtCore.QString("g.x [m]"))        
+        labels.append(QtCore.QString("g.y [m]"))        
+        labels.append(QtCore.QString("g.z [m]"))   
+        self.form.weights.setHorizontalHeaderLabels(labels)
+
+    def onTableItem(self, row, column):
+        """ Function called when an item of table is changed.
+        @param row Changed item row
+        @param column Changed item column
+        """
+        item = self.form.weights.item(row,column)
+        # Row deletion
+        if column == 0:
+            if not item.text():
+                self.form.weights.removeRow(row)
+        # Ensure that exist one empty item at the end
+        nRow = self.form.weights.rowCount()
+        last = self.form.weights.item(nRow-1,0)
+        if last:
+            if(last.text() != ''):
+                self.form.weights.setRowCount(nRow+1)
+        # Fields must be numbers
+        for i in range(0,self.form.weights.rowCount()-1):      # Avoid last row
+            for j in range(1,self.form.weights.columnCount()): # Avoid name column
+                item = self.form.weights.item(i,j)
+                if not item:
+                    item = QtGui.QTableWidgetItem('0.0')
+                    self.form.weights.setItem(i,j,item)
+                    continue
+                (number,flag) = item.text().toFloat()
+                if not flag:
+                    item.setText('0.0')
+
+def createTask():
+    panel = TaskPanel()
+    Gui.Control.showDialog(panel)
+    if panel.setupUi():
+        Gui.Control.closeDialog(panel)
+        return None
+    return panel
diff --git a/src/Mod/Ship/tankWeights/TaskPanel.ui b/src/Mod/Ship/tankWeights/TaskPanel.ui
new file mode 100644
index 000000000..23dc4ff1b
--- /dev/null
+++ b/src/Mod/Ship/tankWeights/TaskPanel.ui
@@ -0,0 +1,97 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>TaskPanel</class>
+ <widget class="QWidget" name="TaskPanel">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>260</width>
+    <height>256</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Set wieghts</string>
+  </property>
+  <layout class="QGridLayout" name="gridLayout">
+   <item row="0" column="0">
+    <widget class="QTableWidget" name="Weights">
+     <property name="alternatingRowColors">
+      <bool>true</bool>
+     </property>
+     <property name="rowCount">
+      <number>1</number>
+     </property>
+     <property name="columnCount">
+      <number>5</number>
+     </property>
+     <attribute name="horizontalHeaderCascadingSectionResizes">
+      <bool>false</bool>
+     </attribute>
+     <attribute name="horizontalHeaderMinimumSectionSize">
+      <number>20</number>
+     </attribute>
+     <attribute name="horizontalHeaderStretchLastSection">
+      <bool>false</bool>
+     </attribute>
+     <attribute name="verticalHeaderVisible">
+      <bool>false</bool>
+     </attribute>
+     <row/>
+     <column>
+      <property name="text">
+       <string>Name</string>
+      </property>
+     </column>
+     <column>
+      <property name="text">
+       <string>Mass [kg]</string>
+      </property>
+     </column>
+     <column>
+      <property name="text">
+       <string>g.x [m]</string>
+      </property>
+     </column>
+     <column>
+      <property name="text">
+       <string>g.y [m]</string>
+      </property>
+     </column>
+     <column>
+      <property name="text">
+       <string>g.z [m]</string>
+      </property>
+     </column>
+     <item row="0" column="0">
+      <property name="text">
+       <string>Lightweight</string>
+      </property>
+     </item>
+     <item row="0" column="1">
+      <property name="text">
+       <string>0.0</string>
+      </property>
+     </item>
+     <item row="0" column="2">
+      <property name="text">
+       <string>0.0</string>
+      </property>
+     </item>
+     <item row="0" column="3">
+      <property name="text">
+       <string>0.0</string>
+      </property>
+     </item>
+     <item row="0" column="4">
+      <property name="text">
+       <string>0.0</string>
+      </property>
+     </item>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>
diff --git a/src/Mod/Ship/tankWeights/__init__.py b/src/Mod/Ship/tankWeights/__init__.py
new file mode 100644
index 000000000..cbfb57d75
--- /dev/null
+++ b/src/Mod/Ship/tankWeights/__init__.py
@@ -0,0 +1,36 @@
+#***************************************************************************
+#*                                                                         *
+#*   Copyright (c) 2011, 2012                                              *  
+#*   Jose Luis Cercos Pita <jlcercos@gmail.com>                            *  
+#*                                                                         *
+#*   This program is free software; you can redistribute it and/or modify  *
+#*   it under the terms of the GNU Lesser General Public License (LGPL)    *
+#*   as published by the Free Software Foundation; either version 2 of     *
+#*   the License, or (at your option) any later version.                   *
+#*   for detail see the LICENCE text file.                                 *
+#*                                                                         *
+#*   This program is distributed in the hope that it will be useful,       *
+#*   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+#*   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+#*   GNU Library General Public License for more details.                  *
+#*                                                                         *
+#*   You should have received a copy of the GNU Library General Public     *
+#*   License along with this program; if not, write to the Free Software   *
+#*   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  *
+#*   USA                                                                   *
+#*                                                                         *
+#***************************************************************************
+
+# FreeCAD modules
+import FreeCAD
+import FreeCADGui
+
+# Qt libraries
+from PyQt4 import QtGui,QtCore
+
+# Main object
+import TaskPanel
+
+def load():
+    """ Loads the tool """
+    TaskPanel.createTask()