Ditto ,what Musky said . Only thing I have to add is these "Captains Pak" style downriggers ,are usually mounted on a swivel base , some packages come with them now I'm pretty sure. They are lockable in the up position (for use w/planer
boards) and as well as down (for use w/downrigger weights). Some buy an extra spool and spool it just with planer board
line , swap it out with wire one when its time to go deep. Also "new" these riggers come with sectional booms or arms , at
the moment I own the manual version of this rigger ($) and it comes in three sections for the arm , I only use two .
Hope this helps.