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Sinus Honoris (latin for "Bay of Honour") is located along the western edge of the Mare Tranquillitatis. The selenographic coordinates of this feature are 11.7° N, 18.1° E, and it has a diameter of 109 km.
Sinus Honoris has a wide mouth and is bordered by uneven terrain to the north and southwest. Where the bay joins the mare, rilles systems extend to the north and south. The northern system is designated Rimae Maclear, after the Maclear crater just to the east of the bay. At the southern end of the bay entrance is the Rimae Sosignes, named for the Sosigenes crater to the south. At the west end of the bay is a finger of mare surface that extends to the northwest for almost 100 km.
