Yup, that makes sense...have also read in the meantime that it needs huge processing capabilities; don't know if they have to upgrade the IT infrastructure also on the F123s. The question is also how long they need to get that system really running but I've read somewhere that they did do already some tests 2006-2008.
Perhaps you model it via a dynamic trigger (dependent on the range LFASS platform <-> target), give then the player a rough solution and make it a little unpredictable via randomization...another usecase for the 'random whale'

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So, modelling a 'moveable' SOSUS.