Seafaring anime

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I'm looking for anime that takes place on the sea, from any time period - IE WWII, Caribbean colonies.
No One Piece, please.

I've watched Zipang and Silent Service.

While we're at it, any decent 17-21st century war anime out there?

[roriconfan]

Earthsea
Christopher Colombus
Nadia Secret of Blue Water
Blue Noah
Blue Submarine No.6
Plastic Little
Tide-Line Blue

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Christopher Columbus and Tide-Line Blue pique my interest.

I'll be sure to check those out.

[SeijiSensei]

These suggestions are a bit of a reach:

The second arc of Mononoke, "Umibōzu," takes place during an ocean voyage. It's only three episodes long, but it tells a creepy nautical tale.

Despite its title, Sky Girls spends much of its time on a warship as the girls and their mecha are transported to various battles.

There's not much seafaring in Real Drive, but there is a lot of diving and other oceanic activities.