FOULING RATES

Question 1

FR 0

Answer 1

A clean, foul free surface. Red/black AF paint or bare metal surface

Question 2

FR 10

Answer 2

Light shades of red/green (slime) Bare metal and painted surfaces are visible beneath fouling

Question 3

FR 20

Answer 3

Slime as dark green patches with yellow or brown colored areas. Bare metal and painted surfaces may be obstructed by fouling

Question 4

FR 30

Answer 4

Grass as a filaments up to 3” in length projections to 1/4” in height or a flat network of filaments, green, yellow, or brown in color. Soft non calcareous fouling like sea cucumbers, sea grapes, or sea squirts up to 1/4”. Cannot be wiped off easily by hand.

Question 5

FR 40

Answer 5

Calcareous fouling in the form of tube worms less than 1/4” in height or diameter

Question 6

FR 50

Answer 6

Calcareous fouling in the form of barnacles less than 1/4” in height or diameter

Question 7

FR 60

Answer 7

Tube worms and barnacles less than 1/4” in height and diameter

Question 8

FR 70

Answer 8

Tube worms and barnacles greater than 1/4” in height and diameter

Question 9

FR 80

Answer 9

Tube worms tightly packed together, barnicles stacked on top of each other less than 1/4” inches height. Shells appear white in color

Question 10

FR 90

Answer 10

Dense growth of tube worms and barnacles 1/4” or greater in height. Shells brown in color

Question 11

FR 100

Answer 11

All forms fouling present. Soft sedentary animals without calcareous covering growing over various forms of hard growth.