Underwater camera, 1/144 Seawolf class

[rva1945]

Static ballast system test:
http://www.youtube.com/watch?v=W6zig13EbKA

Underwater camera:

http://www.youtube.com/watch?v=34P-vOBEOPg

http://www.youtube.com/watch?v=HclVzpJ_9d0

http://www.youtube.com/watch?v=RP1OJIudZ_Y