Crews can also use the software to calculate and view safe clearances based on a ship’s draft, masthead and under-keel clearance allowance. Instant tidal predictions and clearance calculations: enabling quicker and more informed decisions, ATT allows users to instantly calculate tidal heights for multiple ports during a period of seven consecutive days. ADMIRALTY TotalTide (ATT) is the world’s most comprehensive tidal prediction program, providing bridge crews and voyage planners ashore with fast, accurate tidal height and tidal stream predictions for more than 7,000 ports and 3,000 tidal streams worldwide.
