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7 Cards in this Set
- Front
- Back
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Describe a tide staff |
Is a visual scale, Measures the rise and fall of the tide |
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State the selection criteria for a tide staff site |
1. Stability to site, structure and water column 2. Proximity to benchmark 3. Ease of access 4. Proximity to power/phone 5. Minimum exposure to tide regime 6. Minimum exposure to tidal stream/current 7. Minimum exposure to waves 8. Minimum exposure to marine growth 9. Protection from vandalism 10. Avoid restricted entrance. |
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Safety precautions when erecting a tide staff |
1. Location or iron star pickets 2. Lookout for marine dangers |
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Equipment for a tide staff |
1. Tide staff 2. Wire guys 3. Base plate 4. 5x star pickets 5. Underwater hammer 6. Lashing 7. Marker buoys 8. Tool kit 9. Diving equipment |
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Requirements for a tide staff watchkeeper |
1. At least 2 full cycles (50hrs) required otherwise minimum of 25hrs 2. Tide Poles should be read every 30 mins 3. Tide Poles read every 10 mins for the period of 30 mins either side of high and low water 4. Scend, sea and weather conditions should be recorded at any change |
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List and state the purpose of the main tidal record forms |
To record all comparisons that are made between tide gauge and it's associated tide pole H148 AH4 |
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Describe errors in tide staff readinf |
1. Human error 2. Effects of waves, currents and weather |
