I’ve seen a few boats crunch onto the quay because of ferry
wash (And ours has been very close on a couple of occasions!). We are no gurus, but right or wrong, we now use the following techniques to have the cat positioned well, and also safe from ‘crunching’ the quay:
) Firstly we always have fenders on the stern of each hull
. This takes a lot of pressure off the whole experience in case you happen to get too close to the quay.
) If you’re using lazy lines/moorings for the bows, use one mooring
line for each bow.
) If you’re using the anchor
, then make sure you drop the anchor exactly in front of where you will tie up, otherwise the boat will never be square with the quay.
) Whether we are using lazy lines or the anchor, we initially tie off the stern lines with a fair length (say a few meters space between the boat and the quay), tighten up the bow mooring lines or anchor so she’s holding pretty firm. Then (making sure the lazy lines are well clear) pull some reverse power with the engines, and tighten the stern lines as the boat moves back towards the quay. Tie off the stern lines when you are at the desired distance from the quay, then bring the engines back to neutral. If you aren’t close enough to the quay when pulling a reasonable amount of engine power, then you’ll have to loosen off the lazy lines or anchor chain some and try again. (Basically all you are doing is putting some pre-tension on the anchor chain or lazy lines, which makes makes a significant reduction in the boat moving towards the quay when a swell comes through the harbour. This also prevents you from having to pull on the bow mooring lines like a gorilla, breaking your back, and working up a sweat, trying to get enough tension on the lines – which is what I used to do!)
) If using the anchor, then use a chain hook to off-load the windlass
) As cats are nice and wide, I normally have the stern lines running straight back from the boat to the quay (To try and save space on the quay), and then sometimes add two lines from the inboard side of each hull
to the quay (Crossed over), to prevent the boat from swinging left and right along the quay.
This seems to work well for us and you have to find the balance between allowing for some tidal change and making sure you have a good amount of pre-loading to keep the boat away from the quay when that ferry swell does come through. Would love to hear some other ideas too.