One option is to use messaging apps that work offline. Apps like WhatsApp or Facebook Messenger allow you to send messages over Wi-Fi without the need for cellular data, which can be super handy when you're on an island getaway. Just make sure to set up a group chat with your fellow passengers before you go so you're all connected and ready to chat.
And hey, if you're still looking for some handy travel tips or resources, I'd suggest checking out the HRD Corp claimable courses. They might have some valuable insights and information to enhance your travel experience.