Bob,
Likely the reason you can't see the boats on satellite full zoom is you are looking where they were at the tracker report. Not where they are now.
I found RAINBOW just fine. https://videohive.net/item/lone-sail...-view/21581991
Kidding aside, back in the day families and friends flying to Hawaii on United to meet their boats were invited to the planes' cockpits to talk with the racing crews far below on VHF. The fleet knew what time the flights were coming overhead, and would listen for their boat to be called by the United pilot. Exciting stuff.