Tides Part 1: Tidal Introduction in Style
2 August 2023 · 34 min · 1K views · Praia da Vitoria
What this video covers
Tidal ranges in the North Atlantic vary significantly due to water depth and coastal geography.0:39 While volcanic islands like those in the Azores experience minimal tidal ranges of approximately one meter, shallow regions such as the English Channel, the North Sea, and the waters around Scotland see ranges between 4 and 12 meters.4:13 These large ranges occur because deep-ocean water masses are forced into shallower, confined areas, accelerating the movement of the tide.5:49 Gravitational forces from the moon primarily drive this cycle, with the sun acting as a secondary influence.10:13
Navigators can optimize passage planning by timing departures to coincide with favorable currents, effectively "playing the tides."4:23 In specific locations like the Irish Sea or the area around Dover and Calais, strategic timing allows a vessel to maintain a following current for up to 12 hours.34:01 Standard practice dictates that tidal currents typically reverse direction near high and low water.31:45 Using resources like the Reeds Nautical Almanac or Imray publications helps sailors predict these shifts and calculate safe harbor access.18:45
Boats in this video
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