From DangerousWatersWiki
How to resolve ambiguity with the towed array
Towed Array Sonar quick-tip: Resolution of ambiguous bearings is simple. As in a sub, you will turn the ship. You must then watch the contact's trace on the Broadband display; if it moves UP, resolve the bearing of the contact in the direction of your turn. If it moves DOWN, resolve the bearing of the contact in the direction opposite your turn.
Can masts, antennas and periscopes ever be detected by radar?
Unfortunatly the player can't detect masts, antennas and periscopes by radar.
Contributors : fatty