Captain Harley Hunt | How To Know If You Are Dragging Your Anchor | Tom Rowland Podcast Ep. 926

Captain Harley Hunt from How to Boating reveals a GPS-based method to determine if your anchor is dragging, using waypoint marking and distance monitoring to detect drift in any conditions. In this How to Tuesday episode, Harley explains why the Coast Guard's scope ratio recommendations matter, how chain length affects anchor holding power, and the critical mistake most boaters make when their anchor starts dragging. If you've ever wondered whether that wind and tide are moving your boat or just pulling slack through your anchor line, this short episode gives you a precise answer. The technique Harley shares eliminates guesswork entirely.

The GPS Waypoint Method for Detecting Anchor Drag

When you're anchored in open water without solid visual reference points, it's incredibly difficult to know whether you're sitting still or slowly drifting. Harley's solution is elegantly simple: the moment you drop your anchor, press the mark button on your GPS. As you drift back and let out scope, you'll establish a baseline distance from that waypoint. Once you're settled and the anchor is set, note that distance. If you're 100 feet from the mark and staying within a five to ten-foot range, you're solid. But if that number starts creeping up to 110, 120, 130 feet, you've got a problem. The anchor isn't holding, and you're on the move. Harley explains the complete waypoint method at 2:10.

Understanding Coast Guard Scope Ratios

The Coast Guard doesn't just recommend random anchor line lengths—there's science behind their scope ratios. Harley references two key ratios: one for the depth to five for the line in calmer conditions, or one for the depth to ten for the line when conditions get rougher. These ratios ensure your anchor line approaches the bottom at a low angle, which is critical for the anchor to dig in and hold. Too little scope and the pull becomes vertical, reducing holding power dramatically. But here's where it gets interesting: the equation changes when you introduce chain into the system. Harley explains why more chain actually lets you get away with less scope in certain situations. The Coast Guard's scope ratio recommendations start at 3:44.

Why Chain Length Matters More Than You Think

Most recreational boaters underestimate the importance of chain in their anchor setup. Harley breaks down the physics: when you have chain leading from your anchor across the sea floor, you're not just adding weight—you're fundamentally changing how the anchor behaves. The chain lays flat on the bottom, creating horizontal pull that helps the anchor dig in and maintain its set. More chain means the anchor gets more help staying buried, which is why boats with substantial chain can sometimes use less scope than the standard Coast Guard ratios and still hold firm. The Coast Guard doesn't specify exact chain requirements for recreational boaters, but Harley's advice is clear: more chain is better. The complete explanation of how chain aids anchor holding power starts at 4:00.

What To Do When Your Anchor Is Dragging

Detecting a dragging anchor is one thing—knowing what to do about it is another. Tom asks Harley the critical question: if you confirm you're dragging, what's the best practice? Harley's answer is definitive: you need to re-anchor. And here's why this matters more than you might think: if your anchor is dragging, it means something went wrong during the initial set. Maybe the anchor fouled on the way down, maybe it landed in an unfavorable position, maybe the flukes never properly engaged with the bottom. Whatever the cause, an anchor that's dragging isn't going to suddenly start holding. You've got to pull it all back up and start over. It's frustrating, especially when you've already settled in, but it's the only reliable solution. Tom and Harley discuss the re-anchoring protocol at 3:20.

Final Thoughts from Tom

This is one of those How to Tuesday episodes that delivers a ton of practical value in under five minutes. Harley's GPS waypoint method is so simple, yet most boaters have never thought to use it. I know I've been anchored up in open water, watching the anchor line pull tight in the wind, wondering if I'm actually moving or if it's just the tide doing its thing. That uncertainty can ruin your whole day on the water.

The chain discussion is equally valuable. A lot of recreational boaters skimp on chain because they don't understand the physics of how it helps the anchor hold. Harley explains it clearly—that weight laying across the bottom is doing serious work for you. It's not just about the anchor itself; it's the whole system working together.

If you boat regularly, especially if you anchor in varying conditions or away from shore, this episode is worth the few minutes. Harley knows his stuff, and he communicates it in a way that's immediately actionable. Check out How to Boating for more tips like this—whether you're new to boating or you've been doing it for years, there's always something to learn.