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I should have known that. A look at the nav map would be very enlightening. I still think you have a 30% probability hit there. I have been known to swim a fish out there and correct for the second shot for a hit. Forget about range. If you miss ahead, reduce TDC speed input. If you miss astern, increase it. Shoot again for the hit. Sometimes when you're that close you'll get the hit on the first shot.
I'm a little suspicious that there's something wrong with your sonar/TDC technique looking at the amount of range error, which shouldn't exceed 10 or 15% in most cases. Are you throwing the "send range to TDC" switch or pushing the toolbar button and verifying that number with the TDC? Are you watching to ensure you are entering middle of the error range numbers?
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