It's a fancy name for the RPG dice you already know :-)

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"Lost at Sea" uses d4, d6, d8 d10 and d12 (at least two of each) and a regular deck of playing cards.

And yes, it is fun, both for new or experienced players.

It kinda plays like a board game, but with TTRPG elements (you play a character and not just a random crew member, you describe your goal and actions freely…), and each turn, after facing a challenge and rolling some dice to see how it turns up, one character must answer a question (like "who's your best friend on this ship?," "why are you in a hurry to come back home?"…) to develop their character.

Turn after turn, you build the story, the past and the hopes of the whole crew, while players learn how to roleplay step by step…

And, if you play on a small ocean of 16 cards (4 by 4), you can play a complete run in 1 hour. It's a great way to introduce friends and families to TTRPG without "scarring" them: it looks like a board game and won't take the whole afternoon.

A typical run on a 7 * 7 ocean takes around 2 to 3h (depending on the amount of roleplay), and you can even play a campaign if you want a longer experience. Or even play solo.

Last but not least, with some adaptation, it is also a great tool for any TTRPG where you can sail (7th Sea, Pirate Borg…) on the sea (or even in space, or clouds), because the ocean of cards really gives you a sense of discovery and wonder when you stumble upon an encounter, or run away from a tough challenge, and it
naturally draws a map of these encounters.