The cruise line's brand ambassador, John Heald, told passengers what to expect as the International Longshoremen’s Association officially went on strike.

Is my cruise vacation safe? A port strike is affecting 36 ports, but the Longshoremen group isn't striking against cruise lines or military operations

Related: Carnival Cruise Line defends beloved tradition despite backlash. Many will also make sure they can log into the ship's internet and slide their phone into airplane mode,

Many U.S. cellphone plans offer limited calling and text messages in most Caribbean ports. All cruise passengers should check what their plans cover before they leave on their cruises. That's because some plans require an upgrade or purchase of day/week passes to ensure reasonably priced coverage in foreign cruise ports.

With thousands of dockworkers now picketing cargo terminals from Boston to Houston, anyone booked on an upcoming cruise can relax. Despite the strike's far-reaching implications up and down the supply chain,