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Rope length calculator for anchored surface FADs using mixed ropes (nylon/polypropylene)

This tool allows you to determine the length of polypropylene and nylon ropes, as well as the buoyancy of floats and the weight of the cement block needed for your FAD deployment. It must be used in conjunction with SPC latest Manual on anchored fish aggregating devices (FADs)

Required input fields for FAD construction calculation

1. Deployment depth: m

2. Percentage of excess rope (scope): (20-33%)

3. Depth above catenary: m (applied when depth is >= 450m)

Rope diameters:

4. nylon (sinking rope):

5. polypropylene (floating rope):

6. Weight to be lifted:

Calculated values for construction and deployment

Rope lengths:

4. Length of nylon (sinking rope): m

5. Length of polypropylene (floating rope): m

7.Recommended surface buoyancy needed: litres

8. Weight of cement anchor block required: kg

9. Supplementary buoyancy required: litres

10. Distance of supplementary floats from bottom: m