Water rescue at Algonkian Park last night around 8pm. LCFRS, FCFRS and MCFRS responded for a juvenile female in the river. She was said to be on an island by the caller and SW635 located her quickly. Their motor had issues but they were able to get her back to shore with assistance from SW439. Notably, comms were somewhat inefficient on this one, with LOCO and FFX using 6L Tac 31 and MCFRS on their 7A4. Didn’t listen to MCFRS traffic but I never heard anyone say they were on scene or in the water but somehow they still had overall command. BC601 told the SW units to switch over to 7A4 but they seemed hesitant and thus had a radio on each channel, which led to them not being to hear anyone at all what with two radios, the motor, and the river. BC601 was on both but no one from MC ever showed up on the Loudoun channel.