The below tables are referenced throughout the report to formally standardise both biofouling and antifouling condition ratings referred to herein.
| Rating | Description |
|---|---|
| FR: 0 | SOFT - A clean, foul-free surface; red and/or black AF paint or a bare metal surface. |
| FR: 10 | SOFT - Light shades of red and green (incipient slime). Bare metal and painted surfaces are visible beneath the fouling. |
| FR: 20 | SOFT - Slime as dark green patches with yellow or brown colored areas (advanced slime). Bare metal and painted surfaces may by obscured by the fouling. |
| FR: 30 | SOFT - Grass as filaments up to 3 inches (76 mm) in length, projections up to 1/4 inch (6.4 mm) in height; or a flat network of filaments, green, yellow, or brown in color; or soft non calcareous fouling such as sea cucumbers, sea grapes, or sea squirts projecting up to 1/4 inch (6.4 mm) in height. The fouling cannot be easily wiped off by hand. |
| FR: 40 | HARD - Calcareous fouling in the form of tubeworms less than 1/4 inch in diameter or height. |
| FR: 50 | HARD - Calcareous fouling in the form of barnacles less than 1/4 inch in diameter or height. |
| FR: 60 | HARD - Combination of tubeworms and barnacles, less than 1/4 inch (6.4 mm) in diameter or height. |
| FR: 70 | HARD - Combination of tubeworms and barnacles, greater than 1/4 inch in diameter or height. |
| FR: 80 | HARD - Tubeworms closely packed together and growing upright away from surface. Barnacles growing one on top of another, 1/4 inch or less in height. Calcareous shells appear clean or white in colour. |
| FR: 90 | HARD - Dense growth of tubeworms with barnacles, 1/4 inch or greater in height; Calcareous shells brown in colour (oysters and mussels); or with slime or grass overlay. |
| FR: 100 | COMPOSITE - All forms of fouling present, Soft and Hard, particularly soft sedentary animals without calcareous covering (tunicates) growing over various forms of hard growth. |
| Rating | Description |
|---|---|
| PDR: 0 | No anti-foul (AF) coating applied. |
| PDR: 10 | Anti-Foul (AF) Paint intact. |
| PDR: 20 | AF paint missing from edges, corners, seams, welds, rivet, or bolt heads to expose anti corrosion (AC) paint. (undercoat). |
| PDR: 30 | AF paint missing from slightly curved or flat areas to expose underlying AC paint; An AF paint with visible brush swirl marks within the outermost layer – not extending into underlying layers of paint. |
| PDR: 40 | AF paint missing from intact blisters to expose AC paint or an AF coating with visible brush swirl marks exposing the next underlying layer of AF or AC paint. |
| PDR: 50 | AF blisters ruptured to expose intact AC paint. |
| PDR: 60 | AF/AC paint missing or peeling to expose steel substrate, no corrosion present. |
| PDR: 70 | AF/AC paint removed from edges, corners, seams, welds, rivet or bolt heads to expose steel substrate with corrosion present. |
| PDR: 80 | Ruptured AF/AC blisters on slightly curved or flat surfaces with corrosion or corrosion stains present. |
| PDR: 90 | Area corrosion of steel substrate with no AF/AC paint cover due to peeling or abrasion damage. |
| PDR: 100 | Area corrosion showing visible surface evidence of pitting, scaling, and roughening of steel substrate. |