Gooseneck (sailing)

The gooseneck is the swivel connection on a sailboat by which the boom attaches to the mast.

The boom may pivot in any direction, from side to side or up and down, by swiveling on the gooseneck.

[1] The gooseneck may be a two-axis swivel as pictured.

Having an integrated shackle for the tack is common.

Goosenecks on older rigs may be formed by a loop attached to the end of the boom that fits loosely about the mast.