" Incidentally, I have always wondered why naval ship-to-ship communication isn't with a LOS tight beam laser -- unjammable and uninterceptable." Because they

" Incidentally, I have always wondered why naval ship-to-ship communication isn't with a LOS tight beam laser -- unjammable and uninterceptable." Because they do not work when there is mist, which is quite often the case at sea and also I can imagine, it is a nontrivial issue of aligning them, when both ends are constantly moving, due to waves and cruising direction. Also it might give the position away, if you power up the beam to counter humidity. In some cases, it might be beneficial, though.