From the offical directives(which I can't really seem to
remember)
Infantry, Guards, Armour ==> Rank pay + $100 combat
+ $50 additional combat
Shipboard crew ==> Rank pay + $100 combat + $50
additional combat
Aircrew ==> Rank pay + $100 combat + flying hours(don't know
conversion rate)
Combat Engine, Arty, Signals ==> Rank pay + $100
combat
1 year soldier ==> Additional $20
Dunno about Commandos, Divers, and CBRE, except that their pay
is more than usual 
