What does Bornholm Marines do in AoE3?

Gunboat: health regeneration set to 0, XP for building +13, XP for kills +13. The game says: "Gunboats no longer lose hitpoints and can use Stealth. Infantry can garrison in Gunboats to improve their strength."

Home City card

Bornholm Marines

Bornholm Marines (tech ID DEHCBornholmMarines) is a Home City card in AoE3: Definitive Edition 100.19.18309, in the decks of 1 civilization, sent from the Fortress Age. Effect: Gunboat: health regeneration set to 0, XP for building +13, XP for kills +13.

Quick answers (3)

Which civilizations have the Bornholm Marines card?: Danes.
What does Bornholm Marines do in AoE3?: Gunboat: health regeneration set to 0, XP for building +13, XP for kills +13. The game says: "Gunboats no longer lose hitpoints and can use Stealth. Infantry can garrison in Gunboats to improve their strength."
What is the tech ID of Bornholm Marines?: DEHCBornholmMarines.

Gunboats no longer lose hitpoints and can use Stealth. Infantry can garrison in Gunboats to improve their strength.

What it does

Gunboat: health regeneration set to 0, XP for building +13, XP for kills +13

9 further effects (interface, visuals or AI) not listed.

Cost: 1
Sent from: III
Times it can be sent: 1
Game ID: DEHCBornholmMarines

In these decks

DanesIII×1

Source: techtreey.xml and the Home City files, AoE3: DE 100.19.18309 (build 25040513).