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9 Cards in this Set
- Front
- Back
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List the reasons why seabed samples are collected? |
1. To decide where to anchor 2. To determine the type of holding ground 3. To assess safety of anchorage 4. Off shore engineering 5. Mineral exploration 6. Fishing 7. Mine warfare 8. Submarine operations 9. Sonar acoustic performance. |
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List the categories of equipment used to obtain seabed sample |
1. Leadlines 2. Grabs, snappers and scoops 3. Corers 4. Dredgers 5. Divers 6. ROV 7. Opportunity based |
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List equipment required for shipek grab |
1. Shipek grab, bucket, cocking lever 2. Sea bucket (temp) 3. Shot mat (to protect deck) 4. Boathook 5. Water/hose 6. Hard hat, safety boots, gloves, lifejacket 7. Communications 8. SOPS 9. Seabed sample data entry form |
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List the equipment required for mini Peterson's grab |
1. Mini Peterson grab 2. Sea bucket (temp) 3. Block 4. 50m polyester 5. Temporary guardrail 6. Water/hose 7. Safety boots, gloves, lifejacket 8. Communication 9. SOPS 10. Seabed data entry form |
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List the equipment requires for armed leadline |
1. Safety boots, gloves, lifejacket 2. Communications 3. SOPS |
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State the purpose of turbidity observations |
1. Estimating silt run off from rivers 2. Monitoring pollution streams 3. Monitoring algal growth 4. Submarine and anti submarine warfare 5. Mine warfare 6. LADS |
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State the procedure for conducting secchi disk obsevations |
1. Lower disk (white side up) into the water 2. Continue lowering until disk is no longer visible 3. Raise the disk until just visible 4. Record the average of the two depth values 5. Recovery of the disk should be stopped at one metre below surface and the water colour determined. |
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Equipment required for secchi disk observations |
1. Secchi disk 2. Graduated line 3. Forel Ule scale 4. Sea temp bucket 5. PPE 6. Temporary guardrail 7. Communication 8. Secchi disk data entry forms 9. Sops |
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State the purpose of bioluminescence observations |
Bioluminescence is the emission of light by a living organism Highly important for naval operations 1. Ship movement 2. Submarine movement 3. Anywhere stealth is paramount |
