Quote:
Originally Posted by sharkbit
Depending on the type of ship, they represent:
1. Visual range-the largest dashed circle.
2. Asdic Range-the semi circle in front of the ship.
3. Hydrophone range-the circle with the pie shape out of it aft of the ship.
4. Radar range-the smaller circle-stay out of this one later in the war.
These ranges are under best of conditions.

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Does this mean a 100% detection if you are moving within the cirkle or do you still stand a chanse to remain undetected say passing behind a screening escort into the convoy even in "good" conditions say moonlight and calm seas.