One of the ideas I've had on the list(Gunners NF3 is were the idea started to form) is a USCG scenario set in either the Caribbean or Alaska. Caribbean would be anti-drug operations mostly, some fishery protection, and random event such as ship catching fire and needing rescue. Alaska would be SAR either trying to find and rescue lost hikers along the coasts or rescuing Barents Sea fisherman. Would be no combat at all in either of them. Didn't think there would be much interest in a no combat scenario.
That's funny cause I had a similar prototype scene started just after CMO came out, with crab boats where you had to drop and pickup pots, complete with timers on each 'pot' (seafloor sosus unit, was considered a string), where the location as well as temp\depth\timer + some randomness generated if you got some crab in your pots, and how much. Each boat had a quota to fill and a capacity and cannery off-load\port dates to meet, along with random chances for a mishap (damage\fire\flood\over-board|injury\sinking) happening where coast guard assets would come into play. Lots of Lua and special actions to to make it function.
The POC scene (maybe 33% done) was obviously called 'Deadliest Catch', and was just to see 'could it be done?', I lost interest quick in developing\finishing it cause I figured I'm the only nutjob that would be interested in playing a crab fishing sim inside CMO and even I wasn't 'that' interested. Also still had a ton of scripting work left to do\redo for making it very re-playable and add some automation to the fishing itself so I could just watch it run by itself to some degree. But I did get the answer I wanted with the proof of concept, it could be done. Now that I'm reminded of it, it's probably a little easier to do now with some of the bug fixes and recent additions to lua. Along the same lines I was screwing around a little the other day with an airline company\tycoon sim concept, but again started to wonder why am I doing this other than just to see if I can?