FUEL LIMITED OR UNLIMITED?

[Crannogman]

Originally Posted by Sailor Steve

Making an attack in that condition might be a good idea, but cruising? Not only would that slow you down, but would increase fuel consumption dramatically.

The best discussion we've had on the subject can be found here.

That discussion is far from definitive; the only testing concluded that Decks Awash's reuction in silhouette does in fact seem to reduce detection in-game. This makes sense, since game spotting is based upon surface area above water. Also, speed is reduced, although not so much to keep you from maintaining your most efficient diesel speed, ~11kts.

However, nobody did any efficiency testing. In my experience (but without empiric testing, Decks Awash does not drain fuel tanks as fast as running the same speed fully submerged drains batteries, nor does it use as much diesel as running full or flank on the surface. A test would not be hard to design...