Beverley was wondering about the passage and worrying about the length of time it would take. So we got the maps out and I saw immediately where she was going wrong. It was the same mistake that I had made the previous day, in that she was reading the wrong scale. She was reading the scale of the main map, rather than the scale of the insert. I showed her what she was doing wrong and it was like a light bulb going off in her head. She saw what she had done wrong and a huge weight was taken off her shoulders and now we knew that we could get there with plenty of time.
We had to leave early, as the boat that normally moors on the mooring that we had borrowed had already turned up, but was tied up on the pier waiting for us to depart. So we slipped the mooring and motored down to the council moorings which are free to use, while you wait for the tide to turn in your favour.
Calculating when the tide is in your favour can be quite a challenge. In http://www.caernarfonharbour.org.uk/passage-through-the-swellies/ the key phrase is "High Water Slack (HWS) at the Swellies is about 2 hrs before High Water Liverpool". Unfortunately, we have two High waters for Liverpool. Liverpool (Alfred Dock) and Liverpool (Gladstone Dock) and there are a few minutes difference between them. However, it is the Gladstone Dock one that they are referring too, as that is the main port for Liverpool.
After waiting until just before the slack, we slipped the mooring and motored down to the mid point of the first bridge. Both Beverley and I had read the pilotage several times, but as we were going through, I was calling out each section of the passage so that we got the order correct.
- Pass under the central point of Menai bridge
- Head for the Swellies Rock Perch until you have passed the platters
- Then head for the mid point between the Swellies Rock perch and Prices Point, a mark very close to the shore.
- Once through the mid point, head for the flag pole, just by the cottage in the middle of the channel
- Look for the transit markers, on the Britannia Bridge
- Once on the transit line follow it until you are abeam of the white pyramid
- Now head for the centre of the first span of Britannia bridge
- After Britannia Bridge head for Nelsons statue and then you are done