Every mushroom anchor in a soft-bottom harbor has the same flaw.
The cast-iron mushroom anchor sinks into mud and gains suction over time — but its vertical stem is its weakness. As tides, currents, and wind swing a moored boat through 360°, the chain rotates around the stem. Once it catches, every cycle pulls it tighter. Effective scope shrinks, peak loads spike, mooring balls pull under at high tide, and chain or shackle failure becomes a question of when, not if.
Three bars. Conical shape. Far less wrap risk.
Three symmetrically positioned bars rise from the bowl to a single point above the stem, forming a cone. The chain has nothing to catch on. The bowl still beds in, still gains suction, still holds — and tensile strength is higher than the original.
Built like the original. Just smarter.
| MODEL | RECOMMENDED FOR | CONDITIONS |
|---|---|---|
| 400 lb | Boats ~30–40 ft | Heavier displacement or moderate exposure |
Sizing depends on displacement, scope, and exposure. Pricing is by quote and excludes chain, hardware, and installation; shipping is quoted by destination. We'll confirm the right size for your mooring before you order.
Two tests. Both of them honest.
Tensile strength to failure
Horizontal tensile test on a 100-ft bed rated to 1.3 million lb. A 300 lb traditional mushroom and a 300 lb MoorSafe prototype loaded in tension until failure.
MoorSafe outperformed the traditional anchor by roughly 5%.
Breakout after 28-day embedment
Both anchors set on the same muddy seabed for 28 days, then pulled by a lobster boat on a 75-ft chain at 3:1 scope; tension read on a 4,000 lb digital indicator.
Comparable breakout; MoorSafe was fully buried — holding improves as sediment consolidates.
Installs exactly like the anchor it replaces.
Match weight to boat length, displacement, scope, and exposure — or ask us.
Same chain, shackles, swivel, and pennant you use today. Attach at the top eye.
Lower with a mooring barge or service boat, same scope and practice as a mushroom.
Holding grows as the bowl embeds. Inspect on your normal schedule, as you would any mooring.
Any mooring service provider will be familiar with the process. We can recommend providers in your area.
Designed by people who know the harbor.
MoorSafe was founded by Scott Karkos and Captain Gregory Smith (1988–2025), a Maine Maritime Academy captain with two decades of mooring service work. We design and manufacture in Maine because the people who make our anchors are the same people whose boats depend on them.
Put a MoorSafe on your mooring this season.
Harbormasters and mooring services: ask about fleet pricing and association presentations.