Search kayak fishing on google and some info will come up.
PROUD MEMBER OF TEAM GEEZER ---------
Ascend 133X 13' - MotorGuide Xi3 & Mercury 4
On one of my kayaks I went with the Scotty rod holders. Added an extension so my legs would be under it. The extension needs shortened a bit.
Amazon.com : Scotty #256 Triple Rod Holder, Black : Fishing Rod Racks : Sports & Outdoors
Amazon.com: Scotty #254 Rod Holder Extension SS and Nylon : Sports & Outdoors
From marketplace I buy a Mr. Crappie rod holder that had a stainless steel mod to fit over a boat seat post for $30. I removed the seat post. I cut the center post down to fit on another kayak. As far down as it will go a bit to high still.
From a yard sale I got another Mr. Crappie rod holder new in box for $5. Still in the box for now.
Amazon.com: Mr. Crappie Pro Series Rod Holder System Combo : Sports & Outdoors
The Scotty's have blocks in the angle adjuster. Makes it hard to run rod tips just above the surface.