[FT] FTL arrival was Re: Battles of the 20th C

>How could the U-boat or similar design be incorporated into the FT
universe.

Well, Indy ran a submarine game using FT rule at GZG ECC last
February...but I suspect that's not what you mean.

>Would the U-boat be a ship that tends to reside in the appeture of
FTL space before arriving, shooting, then FTL?	Or is it a suggestion
that advanced cloaking rules would apply?

If it does the FTL-in-and-out, it has to wait a while before jumping
out--IIRC about six hours, unless you use house rules that say
differently or figure out some sneaky way around it.  (If you have two
ships with FTL-tug capability, can Ship A carry them in and Ship B
carry them out within the next few turns?).

>If the player wishes for their fleet to arrive in Formation, and not
be affected by random scattering; they unfortunatly announce their
arrival by gravity wells; that most ship scanners will pick up.  A
counter must be placed on the playing area T -3 turns where the
Captital ship will arrive;  T-2 turns where the Cruiser will arrive;
T-1 turn where the Escort will arrive.

I'm curious if you've actually tried that?  I can see the Intruder
putting down one capital ship, waiting for the Defender to respond,
then two turns later putting down a swarm of missile-armed escorts to
respond to the Defender's maneuvers--even though the escorts couldn't
possibly have known where Defender was going to be.  Also there's not
a clear dividing line between classes since FB1.  It might work better
with "all ships place a marker 1 (or possibly 2) turn in advance".