Winning Tides

Surviving the 50 Miles of the Isle of Wight The Round the Island Race is a legendary 50-nautical-mile sprint that tests even the most seasoned crews. Winning this event requires a deep understanding of water movement. While wind strength and direction are important, the Solent tide is what actually dictates who stands on the podium and who parks in a dead zone. This tactical guide shows you how to use coastal tidal streams to outmaneuver the fleet from the starting gun to the final run. Tactical Resources for the Race Course To successfully pilot the course, you need to gather specific tools before departing the dock: - A verified tide table using Portsmouth High Water. Graham Sunderland, author of Winning Tides, recommends using Admiralty calculations rather than secondary sources. - A calibrated depth sounder to help you safely shave corners over shallow rocky ledges. - Detailed tidal charts indicating known back eddies near the island and mainland shores. - A clear copy of the official sailing instructions, noting specific start penalties and course boundaries. Five Critical Gates to Pass from Start to Finish 1. The Start Line Choice Early starters begin their race in the tricky transition period just before high water. You must choose between the Cowes green on the island side or the deep water near West Bramble. Look for the visual boundary bubble of the back eddy on the island shore; staying inside this flow will scoop you along the green. If you choose the northern route, cross quickly to the mainland shore near Leap Spit where the back eddy turns early. 2. The Western Solent Passage Keep close to the island shore early in the run to find relief from the remaining head tide. As the main stream begins to turn in your direction, you must abandon the shallow edges. Head directly into the deep, fast-moving mid-channel current to maximize your speed down toward Hurst Castle. 3. The Needles Rounding When you reach The Needles, make the conservative decision to pass outside the wreck. Shaving the inside of Goose Rock offers tiny gains compared to the catastrophic risk of grounding. Do not swim too far out, though; stay just tight enough to clear the hazard without losing the current. 4. The St Catherine's Ledge Squeeze If you are in the fast, leading half of the fleet, you will face a foul tide on the southern coast. Squeeze up under the beach to find relief, keeping a constant eye on the rocky bottom. If you are in the slower, second half of the fleet, the tide will have turned in your favor; stay offshore in the deep water to get flushed past St Catherine's Point. 5. Ryde Sands and the Finish Avoid the temptation to cut corners across Ryde Sands to escape the tide. The sandbank rises incredibly fast, and getting stuck will end your day. Curve slightly south near Fishbourne to find shallower water, and keep your trimmers active to handle the shifting winds rolling off the land as you approach Cowes. Visual Clues and Tactical Troubleshooting Always watch fixed objects in the water. Lobster pots, navigational buoys, and channel markers are your best indicators of local current speed and direction. Their wakes will show you exactly when the tide has gone slack or turned. Beware of the false wind illusion. In convergence zones, tide moving against a calm surface can create ripples that look like a breeze. Do not sail into these areas expecting pressure; you will get sucked into a strong head tide with no wind to pull you out. Always calibrate your depth sounder before the start so you know exactly how much water is under your keel when pushing the limits on the shallow edges. The Reward of Perfect Tidal Timing Following these steps turns a chaotic day of sailing into a calculated victory. Aligning your boat with the natural conveyor belt of the Solent ensures you maintain maximum speed, avoid costly groundings, and cross the finish line with your keel intact.