Dakar (ËdÃ¦kÉ) n (Placename) the capital and chief port of Senegal, on the SE side of Cape Verde peninsula. Pop: 2 313 000 (2005 est) Daâ¢kar (dÉËkÉr) n. a seaport in and the capital of Senegal. 1,382,000; 68 sq. mi.
As sea turtles are air breathing reptiles, they need to surface to breathe. Sea turtles can hold their breath for several hours, depending upon the level of activity. A resting or sleeping turtle can remain underwater for 4-7 hours.
With this, seals can in all reality stay underwater for approximately 4 days from what I've read. I'm sure the exact time for their equipment is highly classified material. But as to the original question, would seals have to stay underwater. Most seal approaches are done under cover of nightfall to increase stealth.