If I can tend to seaplanes other than mine, I might be able to rig them up with early but ship-girl grade Sonobuoys; and even if I
can't, then there is precedence for their use during this time period
en.wikipedia.org
Do note that my Flying Boats, Mariners or Catalinas regardless, are primarily SAR / ASW craft; also mind that my planes can also have
radar attached to their wings as well..., with a detection distance of around 20 miles to spot a destroyer / surfaced sub
While constant Maritime Patrol is going to be painful, as long as I have a solid flying boat wing we should be fine; what I'm primarly worried about is me
only doing ASW and not having enough space for SAR / Anti-ship duties