Round Turn and Two Half Hitches: The Most Secure Tie-Off

What makes this knot special

The round turn does the work. With two full wraps around the object, friction alone holds 60–70% of the load before the half hitches see any tension. That means you can tie this knot calmly under full load — drop the round turn over the bollard with the boat already pulling, and you have time to finish the hitches without fighting the line.

The two half hitches lock the round turn so it can't unwind. Together the system handles cyclic loading (wakes, surge, tide swings) for weeks without walking loose, which is exactly where a clove hitch fails.

When to use it

Mooring to a ring, eye, or large bollard where you'll leave the boat unattended.

Securing a stern line to a piling overnight in any weather.

Tying a dinghy painter to a dock ring at a restaurant — comes off cleanly when you're ready to leave.

Anytime you need to tie to something while the line is already loaded — kedging off, hauling off a sandbar, snubbing an anchor rode.

On a sailboat, lashing a halyard tail to a cleat or rail when the cleat is already full.

How to tie it (step by step)

Pass the working end through the ring or around the post, then bring it around a second time so you have two full wraps. This is the 'round turn.' Snug it down so the wraps sit parallel and the line is taking some load.

Take the working end and pass it around the standing line, tucking it back through the loop you just formed. That's one half hitch — it should sit against the round turn.

Tie a second half hitch identical to the first, in the same direction, immediately above the first. Both half hitches should spiral the same way around the standing line.

Dress the knot: pull the standing line and the working end in opposite directions until both half hitches sit tight against the round turn with no gaps.

Common mistakes

Only one wrap. A single turn isn't enough friction — the line slips around the post under load and the half hitches do all the work, defeating the purpose.

Half hitches in opposite directions. If the second half hitch spirals the wrong way, you've actually tied a clove hitch around the standing line — it still holds, but it's harder to untie and looks sloppy.

Working end too short. Leave at least 8 inches of tail so the knot has room to dress and you can grip it to untie.

Skipping the round turn entirely. 'Two half hitches' alone — without the round turn — is a much weaker knot that can slip on smooth metal rings.

Round turn vs anchor bend vs bowline

An anchor bend (fisherman's bend) is essentially a round turn and two half hitches with the first half hitch passed through the round turn — slightly more secure for permanent anchor attachments, but harder to untie. Use it for a chain-to-rode connection you'll leave in place all season.

A bowline forms a fixed loop and is the right choice when you need a loop you'll drop over a bollard. The round turn and two half hitches is for tying to a ring, rail, or post you can't drop a loop over.