[propbeanie]

The hydrophone reaches out the furthest of all of the sensors. The APR is the next longest, followed by the radar, then visual. The game can only use one sensor at a time, so if in visual contact, your radar and hydrophone do not pick-up that visual target. You might notice also, that different situations will have different settings on the radar be more or less efficient than the other settings, and that sometimes, the "roll-of-the-dice" will skip multiple sweeps in a row (situationally dependent), such that you might go fifteen minutes without a radar contact, in spite of you knowing there should be a contact. That is part of the game. The APR does not affect the radar at all. However, the added bandwidth of the APR may be affecting your computer and the Time Compression efficiency. The busier an area is, the more the APR picks-up, and throw in all of the "Sonar contact...", "Radar signals detected...", "Radar contact..." and "Ship spotted...", and before long you get "We're under attack sir!!!" In my experience, after the APR is added, you basically cut your ability to use TC in about 1/2. If you were able to do 256x in a busy area before APR, you might only be able to do 128x now.