anchor alarm – Meandering Molly

Wednesday dawned bright and fair. Ben and I had a leisurely breakfast whilst admiring our beautiful anchorage. The anchor alarm showed that we had held firm through the night, which increased my confidence in the holding ability Mr. Spock, our Vulcan anchor, as we had had strong gusts during the night. I wanted to fly my drone, but sadly the anchorage fell within the scope of Lulworth firing range, which prevented takeoff.

Today was expected to be a “no wind” day, but there was a lovely southerly sailing breeze as we lifted anchor and continued our voyage east. With a fair tide under us we passed off St Albans head, turning to follow the coast past Peveril Point, Swanage and finally Old Harry Rocks. The water was very busy with all kinds of pleasure craft, from canoes and small dinghies to large yachts and motor boats, everyone enjoying the sun and sea breeze.

At this point, the tide had turned against us, so we angled into Bournemouth Bay to minimise to its adverse effect. There were obvious overfalls at Hengistbury Head, where the ebbing tide was pouring off the shallow water of Christchurch Bay, over a ledge into the deeper water of Bournemouth Bay.

We had time to kill before the tide changed once more and we could enter the Solent. Our hope was to poke our nose into Christchurch h harbour, but it looked like we would be trapped by the falling tide if we had done so. As an alternative, we sailed into the lee of Hengistbury Head and anchored for an hour or so.

The was not a very comfortable experience initially because I had not allowed for the tide. The anchor bit immediately but Molly did not rest head to wind into the waves, but lay almost broadside due to the flow of the tide. I could not believe that just over 0.5kt of tide could beat 15kt of breeze, but the evidence was clear: as the foul tide eased, Molly turned head to wind.

By the time we lifted the anchor, the breeze was a steady F4 SW and we made excellent progress across the bay, keeping fairly close in and shaping our course for North Head buoy. This marked the beginning of our track into the Solent close round Hurst Point. I wanted to show Ben the full effect of Solent tides, he being unused to strong tides in his home waters of Falmouth, but the wind dropped once we were in the shelter of land on both sides and also shifted to dead downwind.

We shook out the reef we had been carrying and moving quickly, despite sailing slowly, soon made Newtown Creek. I had particularly wanted to show Ben this marvellous anchorage; we had a clue how crowded the anchorage would be by the number of boats anchored outside sheltering under the low headland. Crowded through it was, we did not have much trouble finding a place to anchor. Little scope is needed in this shallow water; in fact we had to raise the centreplate within the anchorage.

As the sun set, the wind faded and we were treated to a most beautiful sunset and rise of the young crescent moon, to the soundtrack of the calls of oystercatchers, geese and terns.

I was very glad of the oven and had put our tinned pies in as we approached the entrance to the creek, so by the time the tinned vegetables were warmed we had a welcome hot dinner.

We had had an amazing passage, covering almost 40 miles and only using the engine for an hour in total – not bad for a “no wind” day!

I enjoy anchoring overnight- one of the pleasures of boating is to find out of the way places and enjoy some peace and quiet. However, in the back of my mind, there is always some concern about whether the anchor will hold, particularly at the turn of the tide, and this can make one’s sleep rather light.

I was always confident in the holding of the rocna-style anchor on our previous boat. Aurora, but the holding of Molly’s pin is unknown to me. I have been using an app called Anchor Alarm to monitor my position. Particularly useful at night, it will alarm if the boat moves out of a predetermined circle. I usually test this by leaving the anchor alarm active when lifting, to check it does the job. I also leave the phone connected to power overnight, as the GPS has a tendency to drain the phone battery.

There are many such apps to choose from, but the features i was looking for are the ability to set the anchor position after dropping the pin (I’m too busy at the time!); to allow for anchoring depth and scope; the app must be able to work in the background, so I can use my phone for other things and finally, some form of graphical display of the boat’s position over time is useful.

After some research, I found Anchor Alarm fulfils all of these criteria. It’s not free and it doesn’t have the ability to remotely monitor the boat position (ie if you go ashore whilst anchored), but I felt I didn’t need that feature. The display is simple and clear and most importantly, it provided me with a sound night’s sleep!

Edit: A few days after writing this, I anchored in St Mawes and the anchor dragged. I think it was due to an improper set of the anchor and/or not enough scope. In any case, the anchor alarm earned its fee because it went off when I was down below and gave me time to start the engine and lift the anchor before we dragged onto another boat.