Woe, Tc - I hope you're able to recover your WitP install & savegames after your sys-crash.
How do I train aircrew specifically in the LowN, NavS, NavB, and NavT roles? In all my time playing this game I've never done that.
Ahh, Pilot Training - my favorite thing. So I've developed some rules:
a) Training groups should be set to Range=0, to keep pilot & airframe fatigue at minimum. This is especially important when re-habbing a tired front-line group.
b) Staff all airgroups w/ max pilots (133% of airframe size), but don't bring in more pilot Replacements than are available in the Replacement pools.
c) Airgroups function best (for front-line or training) when their pilots have identical Exp rating. It's difficult to achieve this in practice, but try to keep the Exp differential to 5 or less. In general, an airgroup assigned to offense will use its best-Exp pilots for missions, while an airgroup assigned to training will work up its least-Exp pilots.
d) For Training, all Missions train best at 5k', except LowN/LowG skill must be trained at 4k' or lower, and Strafe must be trained at 100'. I don't know if ASW or NavS training is altitude-related. I use 1k' for ASW & 6k' for NavS, using those altitudes for both Training & combat missions.
I'm taken aback a bit to read that you're not up to speed on Pilot Training methods, I find it hard to credit. I'll try to give you good info here:
1) LowN - Any non-Transport group can train for this mission, set Training to Naval Attack mission, at alt 1k'.
2) NavS - Set Training Mission to Naval Search. Note that offensive missions set to Naval Search or ASW Patrol always use their 'extended range' ordnance load, regardless of their actual Range setting. This always precludes the use of torps, so if you have a hungry USNavy Catalina sqn that is NavT-trained, set its Group Mission to Naval Attack Using Torpedoes (w/ a %age for Search), instead of Naval Search.
3) NavB - Train at 5k', regardless of plane type. This skill is used for all Naval Bombing attacks at 5k' or above - which will use the altitude-dependent dive-bombing, glide-bombing or level-bombing attack profile.
4) NavT - Only torpedo-capable planes can train or execute this mission. Change the ordnance load (in the center of the airproup's screen) from 'Using BOMBS' to 'Using TORPEDOES' to train NavT. If the 'Using TORPEDOES' text is RED, that means no torps are available - this doesn't affect their ability to Train, but if called on to attack, they'll default to bombs.
5) Strafe - This skill is needed for LowN attackers, once they've upgraded to an 'Attack Bomber' airframe. Train at 100' It's also the only reliable way to attack enemy TFs of barges or suicide boats - send in a group of fighters or fighter-bombers set to Naval Attack at 100'.
hope this helps, forgive me if I'm instructing you on things you already know.