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Originally Posted by Sgian Dubh
1) I have noticed that islands will block RADAR contact if the island is between you and the target. This is great. I have not bee able to conclusively determine is a target will be masked by a large island behind it. Unfortunately, since land does not show up as a RADAR return, it makes it more tricky to tell what is going on.
2) I have been noticing that there seems to be a dead zone for RADAR directly off the bow +/- 15 degrees. That seems odd. I could see a blind spot to the rear or perhaps to one side if there was an obstruction on the the sub that blocked the emissions.
I've seen it a number of times recently. I have a radar target. I turn directly toward it, and it vanishes. If I turn about 15-20 degrees to either side, it re-appears and remains stable.
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Seen both those. I agree the land should be reflecting. The blind spots I'm not real sure about -- based on the rotating antenna, I shouldn't be able to see anything aft of the boat, much less have those little open areas off the bow.