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TopTorp '92 · 04-30-06, 07:54 PM

All good and pure criticisms. However, in the snapshot scenario I envisioned earlier ownship's position had already been compromised by the fact that Troel has used his active sonar and I assumed the range to the target had already diminished well inside say 6,000 yds. The point of the exercise I described was to construct a range of possibilities by which we can reasonably estimate target range given only a few moments of bearing rate data. Combined with other clues from sonar (like getting target blade data), this estimate can help you make tactical choices in an environment where time is the commodity. Combine bearing rate from broadband display along with your LOS, use speed from DEMON and you will have a reasonable range estimate to the target using the position-keeping software that is supplied in the game.

In the scenario you mentioned about the same bearing rate for a target doing 20kts at 40kyds (20nm) as a target doing 10kts at 20kyds (10nm) the best way to get a change in bearing rate without turning ownship is to speed up or slow down. Remember, there are two ways to zig: either turn or change speed. Both take time and both will have an impact on sonar's performance.

Also, for the ranges you cited earlier, although this is a game and DW sonar doesn't come with D/E capability (meaning you won't get a feel about range closure), sonar will still be able to provide SNR data for any contact. So, that 40kyd target will sound different from the 20kyd target based on SNR. Sure, my recommended method will not suffice in isolation. But, nobody makes tactical choices in isolation. All available data must be examined, considered and a tactical picture painted on the CEP.

04-30-06, 07:54 PM	#20
TopTorp '92 Loader Join Date: Jan 2002 Posts: 82 Downloads: 3 Uploads: 0	@Oko All good and pure criticisms. However, in the snapshot scenario I envisioned earlier ownship's position had already been compromised by the fact that Troel has used his active sonar and I assumed the range to the target had already diminished well inside say 6,000 yds. The point of the exercise I described was to construct a range of possibilities by which we can reasonably estimate target range given only a few moments of bearing rate data. Combined with other clues from sonar (like getting target blade data), this estimate can help you make tactical choices in an environment where time is the commodity. Combine bearing rate from broadband display along with your LOS, use speed from DEMON and you will have a reasonable range estimate to the target using the position-keeping software that is supplied in the game. In the scenario you mentioned about the same bearing rate for a target doing 20kts at 40kyds (20nm) as a target doing 10kts at 20kyds (10nm) the best way to get a change in bearing rate without turning ownship is to speed up or slow down. Remember, there are two ways to zig: either turn or change speed. Both take time and both will have an impact on sonar's performance. Also, for the ranges you cited earlier, although this is a game and DW sonar doesn't come with D/E capability (meaning you won't get a feel about range closure), sonar will still be able to provide SNR data for any contact. So, that 40kyd target will sound different from the 20kyd target based on SNR. Sure, my recommended method will not suffice in isolation. But, nobody makes tactical choices in isolation. All available data must be examined, considered and a tactical picture painted on the CEP.