The centerboard boasts an impressive 4-foot (1.2 m) draft when down and retracts by swinging aft on a pivot.
The rig is supported by one set of upper side stays and one set of lower side stays, along with a forestay integrated into the roller furling jib.
There is no backstay, and as a result the stern remains quite clear most of the time. Controls for the cunningham and boomvang are led back to the skipper under a removable spine that keeps
them from becoming tangled in Jib Spinnaker sheets.
The Johnson 18 is a blast to sail. In as little as 5 knots of breeze the boat is manuverable and quick though some leward weight can be required to keep wind adhesion in the sails
In just 10-15 knots of wind these little boats really shine. Their upwind tuning is as dynamic as the main and cunningham controls, allowing rig tension to vary with conditions. And with the asymmetric spinnaker downwind, or on hot reaches, planing is easy and rewarding.