Despite advances is modern navigation equipment sailing in the Ionian is usually by sight. There are many predominant Venitian forts, isolated houses & islets that will clearly indicate where you are in relation to any navigable dangers plotted on a chart.

Hazards

One word of warning though, in the heat of the summer a haze may make a distant feature hard to see until only a few miles off. Likewise on some mornings a sea mist may sometimes reduce visibility to a few hundred metres but this will burn off during the morning.

When sailing in the Gulf particularly it's always prudent to watch out for fishing marker buoys – these come in the shape of black poled flags but also can be marked by plastic water bottles & lumps of polystyrene these usually indicate mussel pots. Watch out for surface nets in isolated bays too these are quite difficult to remove from propellers.