Seaplane information can be found at an FAA site by the “tail number”.

2SF: owned by “AIRLEASE INC” of Spokane, WA; manufactured in 1952

N1179V: owned by “SORENSON FRED C” of Las Vegas, NV; manufactured 1944

N16CJ: owned by “RECTOR JOHATHAN B” of Hancock, MI; unlisted manufactured date

N2SF: owned by “AIRLEASE INC”, of Kenmore, WA; manufactured in 1952

N331TM: owned by ”BEAVER 1247 LLC” of Milwaukee, WI; manufactured in 1958

N639CM: owned by “BEAVER 639 LLC”, of Milwaukee, WI; manufactured in 1954

Flights can be tracked via FlightRadar24.com via a web page or app on phone. This is a fascinating technology that shows these flights flying on top of bald eagle nests and gull rookeries. Federal regulations require aircraft to be not within 1000’ of nests.

According to FlightTracker24, occasionally these planes transponders stop transmitting:

This flight flies over an eagle nest on takeoff, returns close to 2 additional nests, and flies over Houghton County Airport on departure and arrival!

It appears from reading FAA and Michigan DOT regulations, there isn’t a requirement for insurance of any kind. If you know of such, please advise.