This means ports of call have not been seriously impacted. Holland America's Volendam was actually in port that day -- and the ship's captain reported to Cruise Critic that he'd felt a strange vibration while piloting the ship into port and, having no record of a problem with the ship, simply reduced speed. He learned of the earthquake upon arrival. According to HAL, the only major effect on that day's port of call was the cancellation of some shore excursions -- though that was just as much because of torrential rains that had impacted the island over the past few days as it was by the earthquake. German-based AIDAvita called there yesterday.
The earthquake was also felt in Antigua and Barbuda, Montserrat, St. Kitts/Nevis, Saint Lucia, and St. Vincent and the Grenadines.