5 Gezeiten, Leonie&Jessica auf Törn
19 juin 2020 · 8 min · 245 vues · Castletownbere
Ce que couvre cette vidéo
Leonie and Jessica calculate tidal heights and timing in Castletown-Hen, Ireland, to avoid stranding their dinghy, Miranda.0:57 During a previous visit, the crew failed to account for tidal range, leaving their dinghy line submerged and inaccessible at high water.1:09 To prevent a recurrence, they use a tide table to determine the specific high and low water times for August 3rd, applying a 20-to-30-minute correction factor for the local port.4:25 They identify a 4.1-meter high water and a 0.2-meter low water, then adjust these figures by subtracting 0.4 meters for high tide and adding 0.3 meters for low tide.5:50 By measuring the current water level against chart depths of 0.3 to 0.6 meters, they confirm a total depth of approximately 1 meter, ensuring sufficient clearance to navigate the bay before the tide drops further toward the 1:30 p.m. low water mark.7:29 Calculating tidal range and applying local correction factors prevents grounding or losing access to shore-tied dinghies in areas with significant vertical water movement.
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