Although the different types of coating systems of this specification afford superior protection for various shipboard tanks, the coating systems are not necessarily interchangeable or of equal merit for all kinds of tanks and conditions of application. None of the coating systems covered herein are suitable for use in fresh or potable water tanks except by conformance to additional requirements. The coating systems qualified to types I, III, grade A and class 2, grade A may be used when the application and cure temperatures are between minus 7 to 10°C (20 to 50°F). For conditions of use, see 1.2.

Type I coatings are acceptable in geographic areas where their volatile composition is compatible with any existing air pollution control regulations.

Type III coatings are acceptable for use in Los Angeles County and other areas where the rules cited in 6.3 apply.

Type IV coatings are acceptable for use where volatile organic content regulations are limited to either 340 or 290 grams of solvent per liter of coating as stated in 3.2.1.1.

Depending on local application conditions, the acquisition guidance in 6.2.1.2 may also apply to selection of specific proprietary products within each type and class.

Coatings in accordance with this specification should be applied as specified in the contractor's instructions. For Naval ship applications, Naval Sea Systems Command instructions govern when they conflict with, strengthen, or otherwise elaborate on contractor's instructions.

Original coating applications should be maintained by using only materials of the same type. In each instance, touch-up material should be obtained from the same contractor as the original paint and applied in accordance with the contractor's instructions.