Yeah. Annoying, I know, but for a trip like this it really is necessary.
The longer the voyage and the more borders you cross, the less forgiving
“small” oversights become. Things that feel routine on a weekend hop
suddenly turn into mission-critical decisions when you are days away from
your home berth, your usual chandler, or a mechanic who knows your engine.
This is not just a little outing. This is a serious journey, with open
stretches, remote canals, unfamiliar harbors, and different rules per
country. That is exactly why we need to zoom in on the boring stuff,
because the boring stuff is what keeps the ship moving, warm, lit, and safe.
We will go deeper into:
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Engine maintenance
- Spare parts and consumables
- Batteries and electrical reliability
- “How do I do what?” practical procedures on the move
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Gas on board
- DIN bottles and connectors
- Filling stations and country differences
-
Diesel
- Fuel stations
- Bunkering stations
We will try to provide this information for each country. And since we will be
boating through five countries, we will divide the sections accordingly so
you can quickly find what matters where.
Spare parts: bring the ship’s “immune system” with you
On a long route, spare parts are not a luxury. They are your onboard insurance policy.
Every boat has a handful of components that are small, cheap, and easy to pack,
but capable of stopping your entire voyage when they fail.
The trick is not to carry everything, but to carry the right things:
parts that are likely to fail, hard to source underway, or quick to replace yourself.
Think in layers:
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Consumables you will almost certainly use.
Belts, filters, oil, coolant, impellers, fuel pre-filters, spare hose clamps,
fuses, bulbs, and a small stock of electrical connectors. These are the “paper towels”
of engine reliability. You will need them eventually, and you do not want to be hunting
for the exact size in a town where boating is not a thing.
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High-impact spares.
A broken alternator belt, raw-water impeller, or lift pump does not just reduce comfort.
It can end the trip on the spot. Having a replacement onboard turns a potential
multi-day delay into a one-hour fix at a quiet quay.
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Hard-to-find, boat-specific items.
Anything that depends on your engine model, shaft setup, or cooling configuration
belongs in your spares locker. If it is a part that a regular car shop will not recognize,
assume it will not be available on short notice in a random canal village.
Also, spares only help if you can actually fit them. Make sure you bring the tools,
gaskets, sealant, and manuals needed to install what you carry. A spare impeller without
the puller tool, or a fuel filter without the correct wrench, is basically a good-luck charm.
It feels comforting but does nothing.
Diesel hygiene: additives (“dopes”) to keep bacteria out
Diesel on long trips comes with a hidden enemy: microbial growth, often called
“diesel bug.” It is not superstition. Water condensation in your tank creates a thin layer
where bacteria and fungi can live. Over time they form slime and sediment that clogs filters,
starves the engine, and can leave you dead in the water at the worst possible moment,
like in a lock approach, a tight harbor entrance, or against a tidal current.
This is why carrying diesel additives, the old-school term is “dopes,” matters so much.
A good biocide or diesel-stabilizing treatment does three jobs:
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Prevents microbial growth.
By killing bacteria and fungi before they establish a colony, you avoid the filter-clogging sludge
that causes sudden power loss.
-
Helps fuel stay stable during long storage.
When you top up in one country and do not refill for a while, additives reduce oxidation and
keep the fuel cleaner for longer.
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Buys you time when fuel quality varies.
Not every bunkering point has the same turnover or tank cleanliness. An additive is a small,
cheap buffer against bad-luck fuel.
Practically speaking, treat your fuel as you go, especially before long stretches where you will
be running the same tank for days. And always assume that if you see a sudden rise in filter
clogging, the diesel bug might be part of the story. Carrying spare filters plus additive is
the one-two punch that keeps you moving.
Your boat’s measurements are not optional
Below you will find the measurements of Tom. The measurements of
YOUR boat are mandatory if you want to plan a proper route.
Those numbers decide whether you can actually pass an obstacle like a bridge or a lock.
For example, our Tom will not fit on the UK channel system because there are locks that are
only about 2.13 meters wide (7 feet).
So do not start this journey by hope or by guesswork. Measure your vessel yourself, write it down,
and plan with the real numbers. On trips like this, a few centimeters can be the difference between
a smooth passage and a forced detour of hundreds of kilometers (or seamiles).