Here's the rub:
1. It's unlikely that both riverine boat have engine troubles at once
2. Limited footage shows both are standardly armed, but the aft stations were not mounted with MG as would during combat scenarios
3. Sailors wearing AOR2 pattern not the standard navy pattern uniforms...ok, riverine boats are typically used by spec ops and sailors supporting spec ops wears AOR2, no secret here...
4. By the look of the sailors and their personal gear, plus what stored at the cabin, it doesn't look anything more than a transit run - anything else, you'd expect them pack more heat
So far, it seems that both sides buy the story that this is no more than an accident, and the Iranians after having their fun / fuss let the men and boats leave...given that you'd expect much more drums and flare from Tehran, but even they played this unusually cool this time round, could it be this simple of a stray run-in?