When sailing at night never rely 100% on navigation lights – these are sometimes out of order due to the sheer number of them. Fishermen also use bright spots for attracting kalamari, which can sometimes be confused for the harbour light you've been trying to spot.

Typically the Ionian has very few isolated rocks & reefs & these can be seen in good visibility. Green water is always a good indication of a shallow area or reef.

One of the few hazards for swimmers in the area is the sea urchin, which although harmless if trodden on can cause irritation if not removed quickly. These are easily spotted in shallow water & around the waterline of rocks.