Master the Dock: Single Engine and Twin Engine Docking Techniques

Half of a clean dock happens before you touch the throttle. The biggest mistake new boaters make is starting their approach without doing any of this.

Fenders Out, Lines Ready

Put your dock fenders out before you enter the slip, not after. Fenders should be hanging at the waterline on the side you're docking to, spaced to protect the widest points of the hull. If you're docking port-side, fenders go to port. Sounds obvious — still gets forgotten.

Have your dock lines pre-coiled and clipped to a cleat or railing on the appropriate side. The bow line and stern line should be ready to hand off or step off with — not still wound up in the storage compartment while you're drifting sideways into someone's gelcoat.

Read the Conditions

Before you commit to an approach, idle nearby and watch. Look for three things: wind direction and strength, current direction and speed, and whether anyone is in or leaving your slip. Two minutes of observation saves five minutes of embarrassment.

As a general rule: dock bow-into-wind or bow-into-current. Either one slows you down naturally and gives you more control. Docking downwind or downcurrent is harder — the water or air is pushing you into the dock instead of letting you ease in. Manageable, but requires a slower approach and faster reflexes.

Most boaters don't think about what the prop is doing — they just fight the boat when it doesn't go where they expect. That's the whole problem.

Propeller Walk (Prop Walk)

When you put a single-engine boat into reverse, the prop doesn't just push water forward — it also applies a side force to the stern. On a right-hand (clockwise) prop, reverse will walk the stern to port (left). This is predictable, and once you know it, you can use it.

Put simply: if you're docking starboard-side-to and your boat has a right-hand prop, backing down will naturally pull your stern toward the dock. That's free help — use it. Docking port-side in the same boat means you're fighting the walk. It's doable, but you need more speed control and timing.

Single-engine boats are the majority of what's on Canadian lakes and rivers, and they're perfectly capable of clean, controlled docking — once you understand the mechanics and have a process.

The Starboard-Side Approach (Favoured Side for Right-Hand Props)

Approach at a 20–30 degree angle to the dock, slow and steady. As your bow gets to within a boat-length of the dock, put the engine briefly into reverse to check your forward motion. The prop walk will bring your stern toward the dock on a right-hand prop.

Step off the bow, secure the bow line, then use that as a pivot point while you use short bursts in reverse to bring the stern in. Once the stern is parallel to the dock and close enough, secure the stern line and you're done. That's the textbook — conditions vary, but the sequence is the same.

The Port-Side Approach

Approach at a steeper angle — 30–45 degrees — to compensate for the prop walk pushing the stern away from the dock. You want to get the bow close first, then use throttle to swing the stern in.

Some skippers find it easier to spring off the dock on port approaches: get the bow close, secure a spring line from the bow cleat to a dock cleat amidships, then go briefly into forward with the wheel turned hard to port. The spring line holds the bow and the prop walk pushes the stern in. Takes practice, but it's a reliable technique when you get it.

Wind and Current Crossings

When wind or current is pushing you perpendicular to the dock, you need to set up your approach to account for the drift. Aim your bow slightly upwind or upcurrent of your target slip and let the conditions push you into position rather than fighting them at the last second.

In strong crosswind conditions, some single-engine boats will benefit from a slightly faster approach speed so you stay in control and can counter the push with helm response. The mistake is slowing down too much too early — you lose steerage and the conditions take over.

Twin-engine boats are a different world. Two props cancelling each other's walk, independent throttles on each side — the first time you use differential throttle properly, it feels like cheating. It's not. It's just physics working for you instead of against you.

Using Differential Throttle

With twin engines, you can spin the boat in nearly its own length. Forward on starboard, reverse on port turns the bow to port with almost no forward motion. Reverse on starboard, forward on port turns it to starboard. This is your secret weapon in tight slips.

In practice: approach your slip at low speed with both engines neutral. As you enter, use brief throttle bursts on one engine at a time to straighten up, slow down, and position the stern. It feels jerky at first, but after a season it becomes natural.

The Twin-Engine Docking Sequence

Approach the slip at a moderate angle, about 30 degrees, at dead-slow speed. As the bow crosses into the slip, go neutral on both engines. If you're tracking right, give a brief burst of forward on the engine on the opposite side of your turn to keep you aimed straight into the slip.

Once you're inside and need to stop: reverse on both. If the stern is drifting to one side, compensate with a brief forward burst on the engine on that side. When you're parallel and nearly stopped, one person on the dock handles the bow line while you hold position on the engines. Then cut engines and secure the stern.

Wind and Current on Twin-Engine Boats

Crosswind and crosscurrent situations that would require significant planning on a single-engine boat become much more manageable on a twin. You can crab sideways into a slip using differential throttle to hold your heading while the wind moves you over, rather than angling into it.

The caveat: twin-engine docking still requires practice. New twin-engine skippers sometimes overcorrect — too many throttle inputs, too fast, confusing the engines. Slow is always right. If you find yourself making four or five throttle corrections in a 20-foot slip, you came in too fast.

Technique is most of docking, but gear matters too. Having the right equipment and having it ready transforms a stressful manoeuvre into a routine one.

Fenders: Size and Placement

Fenders are the only thing standing between your gelcoat and the dock when something goes sideways. Kimpex inflatable vinyl fenders are a solid choice — they're non-abrasive, have a ribbed surface to stay in place, and sized to suit everything from small runabouts to larger cruisers. The rule of thumb: one inch of diameter per five feet of boat length. A 20-foot boat takes at least 4-inch fenders; a 30-foot boat should be running 6-inch or larger.

Use at least three fenders per side on any docking manoeuvre: one forward of amidships, one aft of amidships, and one at the bow. If you're in a rough or exposed dock, run a fourth at the stern quarter.

Dock Lines: Diameter, Length, Material

Double-braid nylon is the standard for dock lines — it stretches under load to absorb surge and shock, and it's soft enough to handle well. Kimpex double-braided dock lines are pre-spliced and available in lengths from 15 to 40 feet in 3/8", 1/2", and 5/8" diameters to match boat size. Size up if you're between categories — you want a line that handles the load without bouncing the boat around.

For most 20–25 foot recreational boats: 3/8" for bow and stern lines, 1/2" for spring lines if you're in an exposed or high-traffic area. For 26–35 foot boats, bump to 1/2" standard and 5/8" for spring lines. Your lines should be long enough to reach dock cleats with slack for surge movement — typically 1.5 times the boat's beam for spring lines.