[Alrician]

Anyone know of some well-crafted maritime runs or adventures? So pirate stuff, hijackings, oil platforms, undersea laboratories etc.

[Reaver]

If you are looking for ideas, the 3e book Cyberpirates might be a good start. Lots of naval stuff, info on the Carib League...

[Tecumseh]

Reaver ninja'd me while I was writing this.

I think Cyberpirates was technically a 2E product because it came out in 1997 under FASA. 3E launched in 1998 under WizKids.

Aside from that technicality, Cyberpirates has a ton of information about pirate campaigns. It focuses on the Caribbean, the Philippines, and the Ivory Coast. It has gear and watercraft relevant to campaigns in those settings. I used it when I had my runners hop through Jamaica on their way to Aztlan.

That said, it does not have a pre-built adventure. It has lots of plot hooks, but not actual runs. Still, it's where I would start for things related to maritime activity.

[Xenon]

The series Black Lagoon could perhaps serve as inspiration.

[Alrician]

Thanks for the information. I'm more looking for material that has been developed furhter, i.e. floor plans and such.

Is there a floor plan or layout for an Arkoblock in this source? So a maritime arcology? And/or an underwater laboratory?

[Robert]

Try the free "Quick and Dirty" adventure "Trident".
https://www.drivethrurpg.com/product/265128/Shadowrun5-SchnellDreckig--Trident

Its German, but you may be able to use the floor plan and a Google Translate of the text.

[cantrip]

You might take a look at SR:Missions:Free Taiwan

It's from 20th Anniversary Edition -- revolves around a container ship - and it has a map! 

And I think it's free....