Photo: Yellow Sea from DeepSeaWaters
I have seen several references lately to the possibility of blockading North Korea. A good explanation of why this is apparently being considered is in a Bloomberg article by Retired Admiral James Stavridis, who previously served as Commander, U.S. Southern Command; Commander, U.S. European Command; and NATO Supreme Allied Commander Europe. Quoting Wikipedia,
James George Stavridis (born February 15, 1955) is a retired United States Navy admiral and the current dean of the Fletcher School of Law and Diplomacy at Tufts University, a graduate school for international affairs. Stravidis serves as the chief international diplomacy and national security analyst for NBC News in New York. He is also chairman of the board of the U.S. Naval Institute and a Senior Fellow at the Johns Hopkins University Applied Physics Laboratory.
So perhaps we should consider this as a serious possibility. If it happens, would the Coast Guard have a role?
Certainly Coast Guard boarding teams would be high demand.
North Korea shares borders with South Korea to the South, a long border with China to the North, and a short Border with Russia to the Northeast. If the US attempts to blockade North Korean waters in the Yellow Sea and the Sea of Japan, it will bring US naval units into close proximity to both China and Russia including major Chinese and Russian Navy bases. We have to consider how they might react.
Both China and Russia might be more comfortable if the blockading units operating closest to them were Coast Guard rather than Navy. This applies equally to both ships and aircraft.
Certainly to protect Coast Guard units they would have to have Navy and Air Force backup.