Answers:
1. Tear - Drop
Albacore - USS Albacore - A Revolution by Design
http://www.geocities.com/CapeCanaver...6/albacore.htm
http://www.hnsa.org/ships/albacore.htm
2. John P. Holland.
http://www.hazegray.org/navhist/albacore.htm
3. Pancake.
http://www.ussalbacore.org/html/albacore_park.html
4. 400 feet.
Balao - Portsmouth Naval Shipyard
http://www.ports.navy.mil/20th.htm
5. David Bushnell
http://www.chinfo.navy.mil/navpalib/...ubhistory.html
6. Intellegent Whale
http://www.chinfo.navy.mil/navpalib/...ubhistory.html
7. Commander Dudley "Mush" Morton
http://www.fleetsubmarine.com/morton.html
http://www.csp.navy.mil/centennial/wahoo.htm
http://en.wikipedia.org/wiki/Dudley_W._Morton
8. Snorkel.
http://home.surewest.net/gfaus/html/ss482.htm
9. USS Housatonic
http://www.history.navy.mil/branches/org12-6e.htm
10. Manitowick
'Peto' '-
http://www.navsource.org/archives/08/08265.htm
11. Mine laying.
'Argonaut' -
http://www.fleetsubmarine.com/ss-166.html
12. 'L Class'
http://www.globalsecurity.org/milita...ship/ss-40.htm
13. Catfish.
'Pilau' -
http://www.navsource.org/archives/08/08339.htm
14. Oiler.
http://www.history.navy.mil/photos/shusn-no/ss-no.htm
15. The Cusk (or the Carbonero)
'Cusk' -
http://www.usscarbonero.com/index-page4.html
16. The Electric Boat Compnay
'Cuttlefish' - http://en.wikipedia.org/wiki/USS_Cuttlefish_(SS-171)
http://www.historycentral.com/NAVY/S...uttlefish.html
Teaser - A nuclear reactor. Not a SG9 but a S9G as TLAM pointed out correctly. Mastermind you have been caught out !
PS. Q 15 - A cheeky one - depends what you mean by 'guided'.........''Captured German V-1 "buzz bombs"
were altered for remote control (renamed "Loons") and launched from a railing mounted on the after decks.
The primitive control system consisted a modified air-search radar sending signals to speed up or slow down,
go left, right or "dump" i.e. dive on the target.''