@Shazzac74 : Assuming you have EU roaming (not just data but also calls & texts) included in your plan it will only work on a ship when you are in touch with an EU land based network.
Otherwise, You cannot use your usual UK allowances outside the EU but will need to pay the charges or buy roaming add-ons as set out in https://ee.co.uk/help/mobile/roaming/roaming-costs/ > Maritime, Ships, Ferries and Cruises.
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To phone EE CS: Dial Freephone +44 800 079 8586 - Option 1 for Home Broadband & Home Phone or Option 2 for Mobile Phone & Mobile Broadband
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