How to Dock and Swing a Catamaran
Boathandling: Thanks to their dual engines and twin props, maneuvering catamarans in close quarters can be a simple and rewarding experience.
1 Exit Stage Right: The diagram shows the first step to get off a dock when there’s no significant wind or current (which is also a great time to practice). To begin, first maneuver the bows in toward the dock to push the stern out and away from the pier.
2 Cat “Walk”: Once the stern is off the dock, reverse the throttles and engine directions to pull the bows away as well. By repeating the procedure in slow, incremental steps, you can successfully “walk” the boat safely away from any obstacles and into open water.
Docking Ins and Outs
Let’s say you’re approaching a dock to come portside to. Your first line ashore will be a spring that leads forward from your port quarter. Once you’re near the dock, put the port engine in slow reverse and the starboard engine in forward with slightly more throttle applied. This will place the boat close to the dock, and once the spring line is secured and tightened, it will hold you close and steady (with your engines still turning slightly) and allow you then to secure the bow and stern lines and the aft-leading spring lines.
Leaving a dock, use the same principles; apply them perhaps a little more aggressively if boats are parked forward and aft. Tied starboard to, first, place a fender or fenders as far aft on the starboard hull as possible. As the dock lines are cast off, apply more power in reverse to the port engine and less in forward on the starboard engine. This pivots the bows out; once they’re both well clear of the boat ahead, simply transition the port throttle into forward and drive away.
Backing into a Slip
As I said, I’m firmly convinced that backing a cat (or any other vessel, for that matter) into a slip is preferable to bringing it in bow first. On most cats, the steering station is centered or slightly aft, which translates into better visibility to the sides and behind you. It’s important to know how close your sterns are to the dock. It also gives you much better maneuverability and options when bailing out from a maneuver gone wrong: Instead of wrangling with which way to turn when making your escape—when reversing, many sailors have to think a little harder about which throttle to use to turn in the proper direction—you simply drive straight ahead, then decide which way to spin the boat.
In tight quarters, you can approach the slip in forward, then do a K-turn to position the sterns so they’re aiming at the slip with the cat parallel to the docks on either side. Apply reverse thrust on both engines to pull straight back. If necessary, you can apply forward throttle to either hull, as needed, to straighten the boat out as you’re entering the slip.
If there’s not a lot of space in the marina, you may want to enter the area already in reverse, then simply maneuver the sterns into the slip using the same principles described above.
Penned In: When the wind and/or current is abeam, use just enough forward thrust on the starboard engine to keep the boat stable and aid the turn, and more forward thrust on the port engine to spin the cat’s bows clear of other boats and into the current.
Picking Up a Mooring
Cats sit best on moorings when the boats are equipped with a bridle rigged between the bows, the apex of which should be equidistant between the hulls. When the cat approaches the mooring ball, your crew should stand by equipped with a long boathook and with the bridle ready. As with any boat, a slow approach from as far downwind of the mooring as possible is ideal. Have a signaling system in place so the crew can tell you the distance from the mooring and whether you need to steer to port or starboard to line it up properly. Hand signals are best, and everyone should be on the same page so there’s no confusion. Again, slow speed is optimum, and you should be ready to stop forward motion quickly.
As with any boathandling technique, practice makes perfect. You won’t always dock or moor in benign conditions; once you have the basics down, keep practicing in more wind and current so you’re always familiar with how your boat behaves. A comfortable skipper is a calm and assured one.
|Special “K”: Backing into a slip gives the helmsman better visibility and also the option of bailing out if things go wrong. In tight quarters, execute a K-turn to get the sterns parallel to the dock space before reversing in.||The Spring’s the Thing: When parallel to a leeward dock, putting the windward engine in reverse (top) will keep the stern close in. The judicious use of fenders and spring lines (above) will help facilitate maneuvering.|
Tony Bessinger is an instructor at Confident Captain/Ocean Pros in Newport, Rhode Island, and has thousands of miles of catamaran sailing experience, including a stint as a skipper of a Gunboat 62, and a 4,600-nautical-mile delivery of a Leopard 46 from Florida to California. He also drives high-speed ferry cats in southern New England.