
Passive Sonar
The Passive Sonar Screen provides information regarding a submerged target
and allows you to deploy countermeasures. Your options from the Passive 
Sonar Screen include:

Deploy TACTAS
Recover TACTAS
Countermeasures
ECM Manual/Auto Def

Deploying and recovering the TACTAS Passive Sonar device may involve time 
delays. When you deploy the TACTAS, the display range is given in the box 
beneath the screen. The minimum range is 1 nautical mile, and the maximum 
is 50 nautical miles. The Countermeasures option allows you to deploy 
decoys meant to confuse acoustic-homing torpedoes. ECM Manual/Auto defense
mode is a toggle for the selection of automatic or manual electronic 
countermeasures defense modes.

In the box beneath the screen is your ship's own speed and course. When 
you deploy the TACTAS, the display range will also be given. When you 
recover the TACTAS the display range is no longer shown.

