on merged LOBs (TA and SA or TA and UUV) I use 10mn
but with only 1 tracker, I use 20mn, and sometimes 1 hour (especially when making a TMA on active intercept, when I don't have any DEMON on a distant and not so noisy target ... like OHP).
making a TMA with a single track on a straight course target is quite easy with 6 LOBs (really not too difficult), but become more difficult with a maneuvering target.
that's why you need to lock the range if the target start to make some maneuvers.
locking the range and using the last LOB will always give you a good solution on the target, but you will need to compute a bit yourself to lock a good range, this is the crutial part.
this way you can follow a target with less than 10% of error, whatever the target do.
10% of error is enough to give lots of problem to the target.
with some experience you fall to 5% error only, and really follow the target closely.
the best defense against this (if you are the target ...) is to regulary change speed and course.
this will give lots of work to the man on TMA.
But if he already sent his fishes, HE is in confortable position and he can work, when you better escape and are not free do move as you want.
the best way to prevent the shooter to work comfortably ... is to snapshot him, even if you don't have track on him (snapshot on the TIW bearing).
rule number one : NEVER let the other guy working comfortably or you will be in very bad situation, on pressure, until you will be dead.
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