CoreESIM services operate by connecting to terrestrial cellular networks. Therefore, your eSIM will provide data connectivity when your cruise ship is docked at a port in a covered country, such as Nassau or Cartagena, allowing you to connect to local carriers. However, CoreESIM does not support satellite-based maritime networks, meaning connectivity will not be available while the ship is sailing on the open ocean. Plan for shore-based usage accordingly.
HELP CENTER
Will CoreESIM function on cruise ships or at sea?
Updated April 22, 2026
Was this answer helpful?
Related questions
Other answers in this topic that travelers found useful.
Is my eSIMAdventures plan valid for overland journeys crossing between Morocco or into Senegal?
Your eSIMAdventures Mauritania plan is specifically engineered for robust data coverage within Mauritania's borders. For intrepid travelers …
Read answerHow reliable is eSIMAdventures' internet for GPS navigation and safety apps when I'm off-grid in Mauritania?
For essential navigation and safety, eSIMAdventures strives to provide the best possible internet connection, especially along main routes a…
Read answerDo I need to register my passport to activate my eSIMAdventures Mauritania plan?
No, one of the great advantages of an eSIMAdventures plan for Mauritania is the hassle-free activation! Unlike traditional local SIM cards, …
Read answerWill eSIMAdventures provide internet coverage deep in Mongolia's Gobi Desert and traditional Ger camps?
While eSIMAdventures aims for the broadest possible coverage in Mongolia, the reality of the Gobi Desert and vast steppes is extreme remoten…
Read answerWhich local networks does eSIMAdventures utilize for optimal connectivity across Mongolia?
For an adventure as vast as Mongolia, network reliability is paramount. eSIMAdventures partners with the country's premier mobile operators,…
Read answer