Oculus

An Oculus (also known as a “spyglass” or “seeing glass”) is a common tool by airship officers to see objects far off.

Origins
The oculus is in use throughout the airfaring cultures of Cor Nova. In Terra Alta, Misericordiae, and Korkyra, they’re most commonly produced with a collapsing metal body. The airmen of Stella Maris are known to make oculi of bamboo.

Symbolic Use
In most areas, the oculus is symbolic of the command of specific vessel. A silver or gold oculus is carried by the shipmaster, while a brass or tin oculus may be carried by the deckmaster, deckmaster’s mate, and others. The oculus is often carved with the name or image of the vessel, and does not belong specifically to the officer, but rather to the vessel itself. Therefore, when an officer leaves the service of a vessel, he has no more right to take the oculus with him than he does to take the ship’s wheel or her envelopes.