This specification covers cartridge, strip, and tubular types of electrical heating elements intended to be used as listed below aboard United States naval surface ships and submarines and ensures compatibility and proper integration relative to size, function, performance, and standardization.

a. Type I, cartridge:

(1) Immersion heating

(2) Contact metal heating

b. Type II, strip:

(1) Contact metal heating

c. Type III, tubular:

(1) Immersion heating

(2) Cast-in-metal

(3) Contact metal heating

(4) Air heating

Electrical heating elements procured to this specification are form, fit, and function replacements for prior revisions, therefore, existing stock of electrical heating elements manufactured to previous version of document dated 9 September 1982 is acceptable for use until depleted.