Abstract: A slider shoe fitting for a gnav assembly (8) for exerting a downward force on a boom (5). The slider shoe fitting comprises a boom slider (10) for sliding along an upper portion of a surface of a boom, and a strut portion for forming at least part of a strut of the gnav assembly (8). The boom slider (10) comprises a body portion (11) and a plurality of upstanding portions (15). The body portion (11) and upstanding portions (15) are of a single piece of material. The strut portion is pivotally mounted to the plurality of upstanding portions (15).