I've just begun working on my first callouts pack: Coastal Callouts. Currently there isn't much going on at sea in LSPDFR, and I'm working to change that. This will be a callouts series focusing on marine patrols and incidents. I'm planning to eventually have enough to make a boat-based marine patrol fun and interesting, but the callouts will also be designed so that a land-based unit could respond to a dock, grab a boat (or maybe a helicopter or something else), and then head to the scene.
Callouts will include law enforcement and SAR missions, both in the ocean and on beaches, in ports, and around the terminal and docks.
For all you modders out there, if anybody's interested in collaborating, shoot me a PM. I have some ideas already for specific sub-functionality which could be tackled by individual contributors and would make development move much quicker.
If you have suggestions, please let me know! Again, this is very early in the process, I'm still scoping out good locations for callouts and brainstorming what to put in them. So, it's a good time to make your ideas heard!
UPDATE DEC 2019: COASTAL CALLOUTS IS NOW RELEASED!
And, check out these first two Coastal Callouts episodes by @Darkmyre and @Albo1125