What's the difference between forebrace and yardarm?

Forebrace

Definition:

(n.) A rope applied to the fore yardarm, to change the position of the foresail.

Example Sentences:

Definition:

(n.) Either half of a square-rigged vessel's yard, from the center or mast to the end.

Example Sentences:

(1) – as though there were an erotica yardarm, and we all knew when it was.
(2) You’ll have to stack various kinds of cargo on to a wooden ship, either on deck or dangling precariously from the yardarms.
(3) When the sun is so bright it obliterates the yardarm, that is as good as an invitation to go to the pub.
(4) Subsequent drooping of the shoulder with mild weakness of the affected upper extremity seems related to the loss of normal arcuate shoulder motion that is dependent upon the yardarm function of the clavicle.