RORC Nelson’s Cup 2026: Antigua’s Final Proving Ground Before the Caribbean 600 The Caribbean campaign is shifting up a gear. The format is deceptively simple: two days of tight coastal racing in the waters off Falmouth and English Harbour, followed by the Antigua 360 — a full circumnavigation of the island. But simplicity is not the same as ease. The Nelson’s Cup compresses decision-making, exposes weaknesses and demands precision in conditions that mirror exactly what crews will face offshore days later.