There are only two types of vessel; submarines, and targets. This quiz is made up of submarine through-periscope photographs. Invariably interesting back stories if you can find them.

↓ click here to start ↓

↑ click here to start ↑

Get The essential guide to World Submarines
This Covert Shores Recognition Guide Covers over 80 classes of submarines including all types currently in service with World Navies.
Check it out on Amazon

(all corrections welcome)