The Collaborative International Dictionary
Chaser \Chas"er\, n.
One who or that which chases; a pursuer; a driver; a hunter.
(Naut.) Same as Chase gun, esp. in terms bow chaser and stern chaser. See under Bow, Stern.
Wiktionary
n. One of a pair of long guns mounted forward in the bow of a sailing warship to fire directly ahead; used when chasing an enemy to shoot away her sails and rigging
Usage examples of "bow chaser".
There was a puff of white smoke from the bow chaser and a screaming shell struck and exploded, dismounting one of the six-pounders, the flying shards of iron casing killing or maiming every member of that gun crew and several caliver men besides.
If we do it right, then on the upper green-side and the lower red-side we can swing the for'ard-most gun around and use her for a bow chaser at need.
She fired her bow chaser, and the Sprite shuddered as the ball struck her stem and tore through her hull.