CIMSEC has a brief discussion of the possibility of deploying a Coast Guard presence in the South Chia Sea.
First let me say, I don’t think using cutters for Freedom of Navigation demonstrations would be an improvement. Our warships have every right to be there. Substituting Coast Guard Cutters to be less offensive to the Chinese might be seen as a sign of weakened resolve, and it would be a whole lot easier for them to make a move against a cutter than a DDG.
The presumption in these discussions seems to be, that if we do put a presence in the South China Sea, it will be a large cutter. There is another alternative. If we want a Coast Guard presence in the area, perhaps we should start small. We could move three 110 foot WPBs to a port in the South China Sea. When enough Webber class become available, we could replace the WPBs with the newer WPCs and donate the 110s to a navy or coast guard in the area. (It would not hurt if some of the members of the WPB crews were of Asian descent.)
They could do the same kind of capacity building our cutters in South West Asia do. They could help with local fisheries enforcement, particularly the increasingly aggressive members of Chinese maritime militia units. If our cutters occasionally provide force protection or operate with a DDG conducting a Freedom of Navigation Exercise, that’s good too.