[derstosstrupp]

Crash Dive
C – “Alarm!”
D – Sounds alarm bell.

Remaining procedures same as test dive except as follows:
1. Diving officer sets Full Ahead instead of Great Ahead at outset.
2. Diving officer establishes initial down angle of 8-15 deg, and once past 20 meters, increases
down angle to 15-30 deg to “drive” the boat to depth at Full Ahead.
3. Commander may want a 90-deg course change once below 20 m, in which case the helmsman will initiate this on his command (or automatically if desired by commander).

Depth Changes
1. Normally done at Half Ahead (Great Ahead if emergency). Diving officer reports “Boat rising/falling/steady” according to situation.
2. If coming up from depth, perform a sound check at 20 meters, then a scope check at periscope depth prior to surfacing.