As no one has popped up let me address your torpedo question. First, torpedoes are often loaded on a carrier beam with perhaps 3 on the beam. Then, in an action, it is unlikely that an MPA will expend all its torpedoes and may return with some weapons on the carrier beam remaining. Three options are possible. Down load the partial expended carrier and replace with a fresh load. The unexpected torpedoes must be returned to store for servicing. Do not replenish expended weapons; this reduces handling and turnaround time. This will only work if there are sufficient torpedoes remaining, say 4 or 7. Finally replace just the expended torpedoes by offering the torpedo to the installed carrier.
Of the options, do not replenish offers the best time and servicing option. Download and replenish has the greatest time/servicing cost. Replacing individual torpedoes is the middle course ensure a full load out on each sortie.