Simple fix, really:
TT only roll@1 when at ANY point there are no friendly warships present, and cannot be taken as losses until all friendly warships have been sunk or submerged.
TT cannot be forced into defensive combat in conjunction with scrambling aircraft from an AB. However TT can be defended by scrambling aircraft if no amphibious assault has been declared from that SZ.
Example 1:
BB, CR and 2 TT are attacked. CR and BB roll until sunk. Normally, once they are the TT are just picked up off the board. Instead it flows to this: When TT are the only remaining surface ship they get to roll @1 to defend against an attack.
This could mean you only needed 1 hit to sink the BB, however you scored 3 hits during your attacker roll phase. The defender would roll 1 die @4 because the BB was present when the hits were scored on the TT as well.
If 2 hits were scored to sink the BB, the defender would roll @4 and remove a BB and TT from the battle. The following turn the attacker would roll and the lone TT would roll @1 to defend.
If you only scored the single hit to sink the BB, which missed on its defensive roll. You’d follow up with a second round of rolls against the 2 TT, which now get to defend @1 until sunk or you withdraw.
Example 2:
2 TT were left undefended against 2 Ftr and 1 Tac. The 2 Ftr roll @3, the Tac @4 scoring 3 hits. Both TT would roll @1 to defend scoring a single hit. Both TT are sunk, and one Ftr is lost.
Example 3:
2 TT are blocking a SZ you wish to move though - even though they defend @1, you can ignore them and sail straight past without having to stop for battle.
Example 4:
You attack 2 DD and 2 TT with 4 BB. The BB scores 2 hits and the defender none. The defender has to take the 2 DD as losses first per the rules after they rolled and missed. The BB would then roll again and scores 1 hit. Both TT then roll @1 and both score hits. 2 BB are tipped and 1 TT is lost. The BB roll again and sink the final TT, which misses, and the battle ends.
Example 5:
3 TT and 1 SS are defending against 3 DD. Due to the presence of the DD, the SS cannot submerge to avoid combat. The 3 DD roll and score 2 hits. The SS rolls and misses. One SS and 1 TT are removed. The 3 DD then roll against the 2 remaining TT which defend @1 now that the sub has been sunk.
Example 6:
3 TT and 1 SS are defending against 3 CR. The SS elects to submerge to avoid battle. The 3 CR roll against the 3 TT, which roll @1 due to the SS submerging and not being present in combat.
Example 7:
There is an AB on Norway and WGr with 6 Ftr capable of scrambling. Germany has 10 TT in SZ 112. The allies are attempting to land on Denmark via an amphibious assault with 3 BB, 2 CR, 2 DD and 5 TT and elect to ignore the German TT. Germany elects to scramble and places ONLY the 6 Ftr as TT cannot be forced into defensive combat due to a scramble caused by an Amphibious assault being declared from that SZ.
Note if you change a German TT to a DD, you could still not get the TT into the battle as TT cannot be forced into a sea battle due to an amphibious assault being declared from that SZ. The DD, however would be included in the defenders scramble.
However, those TT WOULD be included if no assault was declared and the Allies moved into the SZ to solely attack the ships present.