Delta anchor for inflatable boats and tenders
A delta anchor is a bottom-set anchor with a triangular steel plate that bites quickly into sand and mud and holds its position when wind or current shifts. For inflatable boats, tenders and small motorboats, it is the most common anchor type on Dutch inland waters. We stock the EvoNautic delta anchors in galvanized steel, in 5, 10 and 15 kg.
Which weight fits your boat?
| Boat length | Water type | Weight |
|---|---|---|
| Up to 3.5 m | Inland, calm | 5 kg |
| 3.5 to 5.5 m | Lakes, inland | 10 kg |
| 5 to 7 m | Lakes, coast, current | 15 kg |
When in doubt, choose the heavier weight. The difference in handling is small, the security gain is not.
Galvanized steel
The zinc coating keeps rust out, even in saltwater. Rinse the anchor after use with freshwater and it lasts for years. With an anchor bag you stow it dry and tidy on board.
Frequently asked questions about delta anchors
How do I use a delta anchor?
Do not just throw the anchor overboard. Pay out the line steadily until the anchor reaches the bottom, then give extra line up to five to seven times the water depth and back the boat gently so the fluke sets into the bottom. Check for drift by sighting a fixed point on shore, a pole or building works fine. In current, give more line and check more often. A well-set delta anchor will not shift in normal wind changes.
How much anchor line do I need?
Five to seven times the water depth is the starting point. At three metres depth that means 15 to 21 metres of line. In stronger wind or noticeable current you go up to ten times the depth. On most Dutch lakes and rivers 15 to 20 metres will do, but always take a bit more than you think you need. A spare five metres costs nothing and can save your mooring if conditions change.
What is the difference with a plough anchor?
Both anchors look similar but behave differently. The delta anchor sets faster and is slightly lighter, which makes it practical for day use and shorter stops. A plough anchor has a hinged shank that stays more stable in strong wind shifts or overnight anchoring. On Dutch inland waters, where conditions are rarely extreme, you will hardly notice the difference. For most leisure sailors, the delta anchor is the simpler choice.
Should I also use an anchor chain?
A short rode of half a metre to one metre of chain between anchor and line keeps the anchor fluke at the bottom so it sets better. It also protects your line on rocky or shelly bottoms where rope wears quickly. You do not need a long chain, half to one metre is plenty for most leisure sailors. Combine this with a solid anchor line and your mooring is secure.
Shipped from our own stock. Visit our store in Joure or contact our specialists.
