A Boat Lantern is a craftable Boat attachment in the Shipwrecked DLC. It requires a Science Machine to prototype and 1 Empty Bottle, 2 Twigs, and 1 Firefly to craft, and can be found in the Light Tab. It is also a reward from the Yaarctopus in exchange for Surf 'n' Turf.
The Boat Lantern needs to be attached to a boat to function. When it is attached to a Boat, it can be turned on or off at will, and provides light when turned on, protecting the player from Charlie. It has a limited durability and will eventually run out if kept on, but it can be refilled with Bioluminescence or Fireflies to extend its lifespan.
- Because Fireflies and Bioluminescence are non-renewable, it is less resource-friendly to refill boat lanterns than acquire new lanterns by trading with Yaarctopus. But, If you have merged your Shipwrecked world with RoG, you can use Light Bulbs.