Anchoring your boat might feel like a simple routine, but it can cause serious harm to sensitive marine habitats if not done carefully. In the Adriatic sea, which is part of the Mediterranean Sea, especially around areas rich in Posidonia seagrass like Zlatni rat beach, careless anchoring in Posidonia can destroy decades of underwater growth in minutes.
Whether you’re enjoying a summer cruise or exploring Croatia’s stunning coast, anchoring with care is essential for protecting the “Amazon of the Mediterranean”—a nickname given to Posidonia oceanica, a vital species for marine biodiversity and carbon storage.
In this guide, we’ll share sustainable anchoring tips to help you enjoy your time at sea while minimizing your impact.
Research the Area Before Anchoring
Before heading out, research where to anchor a boat safely and responsibly. Look up protected marine areas and zones with seagrass beds, coral, or other sensitive habitats. You can use resources like the “Anchoring with Care” map from The Green Blue or local marine conservation sites.
Anchoring on Posidonia oceanica meadows around Zlatni rat is forbidden and should be avoided at any time!
Eco-moorings or pre-installed mooring buoys are preferred whenever available—they eliminate the need to drop an anchor altogether. This one simple step supports sustainable boating and preserves key habitats.
5 steps to correct anchoring
- Approach the anchoring place facing the wind and identify a clear bottom zone (sand bottom). Avoid anchoring in Posidonia meadows
- Throw the anchor when the boat is stopped. The anchor size has to suit the size of the boat.
- Release the anchor chain or rope (at a length 3 times the water depth) while the boat is slowly going backwards.
- Wait until the bow turns into the direction of the wind and check if the mooring holds.
- Upon leaving, move the boat to the position directly above the anchor and then pull up the anchor.
Choose the Right Anchor for the Seabed
Not all anchors are created equal. The type of anchor you use should match the seabed composition—whether sand, mud, rock, or seagrass. Using the right anchor reduces drag, which is one of the biggest causes of seabed damage.
Even after setting the anchor, check regularly to make sure it’s holding and not dragging across the sea floor. If it has moved, reset it immediately to avoid damaging the seabed.
Use the Correct Anchor Chain Length
Too much chain can cause unnecessary damage to the seafloor. A good rule of thumb is:
4x the water depth at high tide if using a chain only
6x the depth if using a mix of chain and rope (warp)
Marking your anchor chain every 1 or 5 meters helps you control the amount deployed and prevents anchor chain abrasion—a common threat to seagrass meadows.
Anchor on Sand, Not on Seagrass
When choosing a spot to anchor, aim for bare sandy patches away from the edges of seagrass beds. Avoid Posidonia oceanica zones—this ancient plant plays a vital role in oxygen production and marine life shelter.
Also, factor in your anchor swing radius to ensure your chain doesn’t drift into protected zones as the wind or current shifts. Even a small movement can cause massive damage to marine ecosystems.
Note!
- On the rocky bottom, there is a higher possibility of the anchor getting stuck.
- On rocky and coralligenous bottom, chains and anchors destroy corals and species that live there.
- In Posidonia meadows (dark bottom), anchors do not hold but damage the plants.
Retrieve the Anchor Without Dragging
When it’s time to move, retrieve the anchor with care. Move your boat slowly over the anchor point and pull the chain vertically. If needed, use a trip line for easier lifting. Avoid dragging the anchor behind your boat, as this can uproot seagrass and disturb marine life.
If resistance is felt, motor gently toward the anchor to loosen it—don’t yank or pull it sideways.
Monitor Anchor Holding Position
After anchoring, use a fixed reference point on land to detect any drifting. This simple method helps identify if your anchor is dragging and gives you time to correct it before any real damage occurs.
Remember: every part of your anchor setup—from flukes to chain—affects the seabed. Take nothing for granted.
Respect the Amazon of the Mediterranean
By following these eco-friendly boating practices, you help protect the Mediterranean’s most precious underwater landscapes. The seagrass meadows of Posidonia oceanica are essential to climate regulation, water clarity, and marine biodiversity.
Let’s make anchoring without damaging the seabed a new standard in recreational boating. Whether you’re chartering a yacht or sailing your own boat, it only takes a few small changes to make a lasting difference.
Sail responsibly. Anchor consciously. Avoid anchoring in Posidonia meadows. Protect the sea we all love.
Avoid anchoring in sea grass – Respect the Amazon of the Mediterranean
