Iain_S

Petrol or diesel? A petrol engine is far more likely to escape damage, as the lower compression ratio allows greater valve/piston clearance.

Fair enough if it was a foul water drain. (If not, NOT!)

Agree: there are a lot of other potential moorings in the other basins, which are buoyed off to prevent entry

The option of "such a security ... " was removed in 2019 by The Motor Vehicles (Compulsory Insurance) (Miscellaneous Amendments) Regulations 2019.

I'd have thought right to left. Initial impact to door, then scrape as Tilley Anne rocks away from impact, so the scrape goes down the side as it progresses.

You can use straight cooking oil or oil converted to biodiesel without being liable for tax, provided that annual production does not exceed 2,500 litres. See para, 4.2.1 here Edited to add : I see that this point has already been made

As others have said, quite normal for the pump to cut in and out when tap open continuously, depending on flow rate. With a shower, depending on the source of hot water, it may smooth out temperature variations if there is an additional cold tap running enough to make the pump run without cutting out/in. Effect particularly marked if hot water comes from an instant water heater.

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Would 100A through 1 ohm not need 100V?

Would only apply to a Pleasure Boat Certificate, though, or, as CaRT (incorrectly) refer to it, a Rivers Only Licence.

My usual "quicky" for scratches is a rub down, followed by Vactan (which cures to black). This holds everything until I/we get round to painting. We usually paint side deck to top rubbing strake on one side in one hit, which makes a better job than touching up.

Avoiding VAT, I think

Initially, that will "pump" a quantity of water equal to the boat's displacement up to the upper pound, with the water displaced from the top caisson and flowing into the bottom one, then getting transferred to the top as the next boat comes down. However, with the extra water in the upper pound, the effect would diminish with successive boats, as the extra water in the upper pound would result in the top caisson filling to a higher level than the lower one. This effect, however, would be negligible compared to the water added to the upper pound by the necessary operation of the staircase locks to bring the boats to the top of the wheel, and the pumps and sluices would operate to keep the levels correct.

It works most of the time, but fails when length of boat plus wind speed combine to overcome the leverage of engine against stern post. Short and wide helps; narrow and long hinders, When we moored at Barton Turns, the service area seemed to always be a lee shore! Easy getting in, but hard to get out. My most successful method was a bow spring to take the stern off, and then reverse back to the marina entrance, where the boat could be turned. The reverse was made easier by the wind being from the stern to bow. Th OP may find this method will work, as a centre cockpit Sea Otter is 26' or 31', so can get the stern to a greater angle than is possible with a longer boat.