Cannonball was the name we used on 216 Sqn for the bi-weekly run to ASI. The Cannonball crew flew the leg to ASI then handed over to the pre-positioned FI crew who carried on to MPA. The Cannonball crew overnighted at ASI and then flew the return leg back to BZN. I did it a few times, left BZN on Thursday night, spent most of Friday and Friday night on the beach etc at ASI before returning to BZN on Saturday night. This may or may not be the Cannonball you are referring to.