From Starbounder - Starbound Wiki
Anchor is a decorative object found attached to a chain underneath Avian Airships. Each Airship always spawns with exactly one Anchor.
|A heavy piece of iron, an anchor perhaps.
|An anchor from an Avian airship. Ironically, many of the grounded live their lives on airships amongst the clouds.
|Iron hook, very heavy.
|Curious. The Glitch make use of anchors like these on their great sailing ships. Why is this one here?
|A massive anchor.
|Ah, an anchor, I have heard tales of these smashing through Hylotl structures.
|That's one heavy lookin' hunk of metal.