Tiller Pilot vs Below-Deck Autopilot

A tiller pilot is a self-contained tube that pushes the tiller from a cockpit socket. A below-deck autopilot is a system: a sensor, a course computer, a control head and a drive bolted to a tiller arm — definition on the rudder stock under the deck. One costs about the price of a good pair of binoculars and installs in an afternoon; the other costs as much as a small car's service history and takes a yard two or three days.

The honest question is not which is better but when the tiller pilot stops being enough. In Australia that point usually arrives with the first serious coastal passage in a following sea, the first night at sea, or the first time the boat is loaded for a season away and the tiller pilot starts alarming every twenty minutes.

A tiller pilot needs suitable attachment geometry and clearance throughout its operating movement. Bring photographs and measurements to the supplier, including cockpit obstructions and the point where the drive attaches to the tiller. Boat length alone does not establish whether a unit is appropriate.

A below-deck proposal needs a different survey: rudder stock or quadrant access, structural mounting, actuator movement and access for inspection. A hidden drive can free cockpit space, but limited access may make the installation more involved than the equipment price suggests.

Consider how the pilot will be fitted, engaged, released and stowed during a normal outing. A removable unit may suit occasional use if the crew can perform those tasks comfortably. Frequent use may justify exploring a permanently installed system, provided its mechanical design suits the boat.

Ask for a demonstration of manual takeover and access to any mechanical release. Compare the service arrangements and contingency plan for both options. Neither an accessible tiller pilot nor a concealed actuator should be treated as a replacement for a workable manual-steering procedure.