Hot, hazy, humid with very light south wind. Underway at 3:30 pm heading southeast against the odds and the rising tide. Drifted around Willoughby Bank for an hour, roasting alive in the sweltering air, criss-crossing the tideline, never over 2 knots. Fine view of the Maersk Denver cruising outbound in TS Channel. Crew rapidly consumed onboard iced water supply. Finally returned around 5:30 for a flawless arrival.