Good to know
The IJsselmeer is a large expanse of water. Although you can see at least one shore on a clear day, a harbour is always a long way away when things go wrong. The boat has to be properly equipped for such waters. Therefore, there must always be a reliable waterways map (map 1810) on board and at least a compass, a log, a watch and a plotter. Having GPS equipment on board makes navigation a whole lot easier. If visibility is poor you have to be able to find your way using maps. Properly dimensioned anchor equipment is essential. You have to be able shelter from rough weather. You should, of course, also have life jackets and distress rockets and there should also be a radio on board so that you can monitor the weather forecasts. A marine telephone is also advisable (you will need to obtain the necessary papers) because large areas of the IJsselmeer are not covered by the GSM network.
IJsselmeer is known for its short swells. That is not so dangerous by itself, but it must be taken into account. Motor yachts in particular experience a lot of hindrance from transversely incoming steep waves. If the vessel does not have the required stability, it will even risk capsizing. Safe sailing is a matter of assessing the conditions of a certain route in advance and to select a safe heading when you are being surprised by excessive swells.