Sorry Squire. i was less than clear.
My original post was the entire US SZ10 fleet to SZ8 to offload to London. That allows a DST, 2 TRN for fodder, 1-3 FIGs, and a BOM to counter-attack the German fleet(s) in USA2.
Sending the DST (or both the DST and the TRNs) to SZ12 is another option.
And I am sure that the 3 moves I psoted above are not the only blocks/counters They are just 3 I thought of offhand. And then there are variations on those 3 (A DST instead of the TRN and INF to block SUBS from sailing through would be a prime example).
Correct me if I am wrong, but the purpose of buying TRNs in the Baltic is to both threaten Sea Lion, and to help increase the odds of a Kreigsmarine link-up. To achieve that purpose, Germany has to buy the TRN’s, get the Baltic fleet relatively intact to SZ7, get the Med fleet to SZ7 relatively intact, and have sufficient AF available to support an attempted landing in London.
With a strong UK naval buy, the AF is needed for the naval battle, and the TRNs are likely to be fodder. That removes the Sea Lion Threat, both in the initial move, and in the linked fleet that is missing TRNs and is not adjacent to an IC so that more can be dropped and protected. Also, in trying to link the fleets to preserve them, you have to fight through a very tough little UK fleet in SZ6, with expected heavy losses. And any ships that engage in combat in SZ6 won;t reach SZ7 until G3… and you probably won;t kill that SZ6 fleet with just AF (97% failure probability of 5 FIG, 1 BOM against 1 AC, 2 FIG, 1 SUB, 2 TRN, 1 DST, 1 BB). That means that, after G2, you have not made the link-up, and now UK gets to counter (maybe with just a BOM, but only 1 of those fleets has a BB, so they will take out a unit on average), and the US (with up to 3 FIGs, 1 BOM, 1 DST, 2 TRN).
So Germany spends 60% of their initial buy on Navy, and come G3, they MAY have 2 units left in the Atlantic, if the dice were favorable; more likely the Atlantic is devoid of ships, Allied and German.
But then on UK 3, UK builds fleet, more US fleet sails in and more is built. Allies are landing anywhere they want in Europe or Africa on T4. And Russia has probably done rather well in the East with the Luftwaffe beign tied up on sea duty.
If all you want is to secure Germany from landings before T4, there are cheaper ways to do it. IMHO.