Momac

Tidal stream charts on the following Hourly tidal streams North Sea, Southern part : by VisitMyHarbour [Tidal Streams] - VisitMyHarbour articles

This is generally correct. The CO2 breathed out by humans is not counted in carbon calculations So things you do physically with hand tools can be the closest thing to carbon neutral and could be carbon negative eg planting a a tree or growing vegetables. HVO , if made from vegetable bi products like the unwanted stalks of vegetable plants or from spent cooking oil, would be a great fuel. But I believe a lot of energy is required to make it so it can never be carbon neutral. The cutting down of rain forest to grow palms for HVO production is clearly not sustainable but this is my main worry against HVO as the fuel retailers cannot be certain of the source of the fuel on a world market. Rain forests cannot be reinstated. They are the lungs of the earth. If we remove them will will die. The suppliers must prove there is no rain forest destruction involved but I am not sure this is possible. But really HVO if it could be proven to be truly sustainably sourced is a perfect replacement for diesel and instantly reduces emissions and thought to be not prone to bug.

Its sustainable if they plant new trees to replace the removed tress. The trees were planted in the first place for paper pulp but books and newspapers are much less used these days so there is reduced demand. Therefore the use of the same fast growing trees for fuel instead of paper pulp isn't such a bad idea. Transporting the wood pellets from Canada to the UK however does seem bonkers

Narrowboats are designed and built specifically for the UK canals. Only the very adventurous take them to sea and then only in benign conditions. 2metre waves will almost certainly sink a narrowboat. A lumpy water boat may be able to do some canals but likely to be uncomfortable and possibly unwelcome and certainly not able to do narrow canals. One boat to do both jobs is not possible.

We just bought an air fryer and tried it the first time yesterday evening at home. Hopefully it will not join my wife's collection of unused kitchen gadgets. From a boating perspective we would be using the air fryer when hooked up to shore power which we have at our home mooring and at some locations we visit on our travels on salty water. Similarly we have an electric kettle on the boat for use with shore power.

Yes. See earlier post from Jupiter1124 . Really I do think HVO is potentially an ideal boat fuel but not acceptable if it involves cutting down rainforest to grow palm oil. Cut out the rain forest destruction and use otherwise waste vegetable matter to make HVO and that would be great. Equally hauling wood from Canada to fire a power station in the UK is not carbon neutral. Better than burning coal but not carbon neutral.

I did not say that . I would be very much in favour of HVO if it is responsibly sourced. But I am not convinced that it is . My objection is to the inaccurate use of the term 'carbon neutral' HVO certainly is low emission so better than diesel . But that doesn't make it carbon neutral.

Energy is required to produce HVO and to deliver the fuel. No fuel is carbon neutral unless it involves no fossil fuel and it is produced and delivered to its point of use by a non industrial process.