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O God, thy sea is so great and my boat is so small…

submitted by SFOGuy

9 years 7 months 1 week ago

This is from a documentary called "Oceans" by a French film company. This is the French naval frigate Latouche-Tréville (D646) making slow, very slow, headway in a big Atlantic swell.

The globular dome under the bow is a sonar dome; it is usually pressurized with freshwater (it can be conceptualized as being a big rubber balloon). "Banging" into the sea too hard with big drops can apparently overpressurize and "pop" it.

In a small boat, the heaving and lifting of the stern would threaten to throw a prop off; but apparently, the heavy large ship prop shafts prevent that sort of "overspeeding" for this frigate.

Look how wet the frigate's forward decks are in this sort of sea; it seems to me it would be hard to actually take meaningful military action from the forward decks. This is true despite the face that she has a sort of "clipper" bow, which flares out as it rises from the water---so the deeper she presses into the sea, the greater the buoyancy reserve the bow has (more resistance to sinking deeper)...Makes you wonder how a wave piercer bow would do as soon as the swells got as big as this; I would assume they'd sweep the entire length of the ship...