Georgetown has 3 cruise ships a few miles offshore. Ships being west of the island will likely shelter them from any tsumani.
Most vulnerable there will be any passengers in tender boats going to/fro the pier. I’ll expect they might stop transport to/from for a number of hours until the coast is clear.
“Georgetown has 3 cruise ships a few miles offshore. Ships being west of the island will likely shelter them from any tsumani.”
Actually, the tsunami could come from any direction - usually they are caused by a large underwater landslide which could occur anywhere in the area. It depends on the geography more than the location of the epicenter.
As for the cruise ships, they will be safer the further from land they are. Tsunamis are not these huge cresting waves that you could surf on an aircraft carrier, they are typically more like supersized storm surges.