See also: Fox (homonymy)

A fox , for the navy with old veil, was a memorandum which allowed the man Quart or the Timonier to note for each half an hour the conditions of navigation.

Generally composed of a plate out of wooden or copper, more or less decorated, it represents a circle on which the 32 sectors of the compass were traced and of which each received 8 holes. At each half an hour, the quartermaster defers the conditions of wind, either that they changed, or that the road was modified, while there planting ankle envisaged for this purpose. Thus, the officer of the watch or the navigator, during his change, can revalue his Navigation with the regard according to this information. It should not be forgotten that the sailors were then generally illiterate and that thus, it was necessary to provide them simple instruments and not fearing the bad weather.

Today, on board the warships, the fox is a similar plate, out of copper, decorated with the name and badge of the building, and bearing the names of the officers and the officers higher marines of the edge. It is used by the sentry with the Coupée to point with ankle sliding their presence on board or their exit with ground.