Is there a difference of pressure between Saltwater and Freshwater?

Question

Like the submarine thing I read today. If i go down really deep in a submarine, is there a greater pressure in say Saltwater than freshwater or vice versa? Or is the pressure the same in both?

Answer 1

The pressure is different . Salt water is lighter

Answer 2

There is a difference...

(rounded to the nearest pound)

seawater   is 64 lbs a cubic ft.

freshwater is 62 lbs a cubic ft.

therefore, seawater is obviously heavier (not lighter)

As all divers and submariners know, there are also latitude, temperature, and atmospheric as well as salinity depth pressure variables. Sea-water density is also dependant on salinity, with high salinity water being about 3 % denser than fresh water. This too affects the change of the pressure/depth relationships related to divers and submarines.

Happy & Safe Boating!

Answer 3

Saltwater has greater density than fresh water.  Therefore for the same depth below the surface, the pressure will be greater in salt water.  This is also why things are more buoyant in salt water.