Is one of the US coasts near the Solomon Islands? What the he’ll is a US Coast Quard ship doing way the he’ll over there?
Because the Pax Americana. The USN rules the waves, and has the thankless job of making sure local potentates dont take up unfortunate practices, like preventing free transit through international waters.
The Solomons are a good place to be a choke point for Australian trade to the US for instance. In WW3 China, with a string of bases down the Pacific, could isolate all of East Asia from the US. No bueno.