“De-icing” after a dive in Lake Ontario. Water is at refreshing 9C, but on a positive note: NW wind flattened out lake, there is no thermocline and viz is 12 m! Photo: “De-icing” after a dive in Lake Ontario. Water is at refreshing 9C, but on a positive note: NW wind flattened out lake, there is no thermocline and viz is 12 m!