But "if the Coast Guard boarding officer were to conduct a vessel safety inspection under normal circumstances and see that many people on board a boat that size, they would definitely recommend that the operator probably return to port and offload some of them, " Mr. McKenzie said.

WSJ: 3 Children Die After Yacht Capsizes

But Precheck travelers actually don't know if they will get to use the easy screening until the TSA officer checking IDs actually scans the boarding pass.

WSJ: $100 to Fly Through the Airport

The officer could only advise the pair to raise a stink on boarding the next plane to avoid leaving Africa.

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