DEPARTMENT OF THE NAVY
OFFICE OF THE CHIEF OF NAVAL OPERATIONS
2000
NAVY PENTAGON
W
ASHINGTON DC 20350-2000
OPNAVINST 2400.20G
N2N6
7 Jan 2021
OPNAV INSTRUCTION 2400.20G
From: Chief of Naval Operations
Subj: ELECTROMAGNETIC ENVIRONMENTAL EFFECTS AND SPECTRUM
SUPPORTABILITY POLICY AND MANAGEMENT
Ref: (a) DoD Instruction 4650.01 of 9 January 2009
(b) DoD Instruction 3222.03 of 25 August 2014
(c) SECNAVINST 2400.1B
(d) SECNAVINST 2400.2A
1. Purpose. This instruction establishes Navy Electromagnetic Environmental Effects and
spectrum supportability policy ensuring reliable, safe, and mission capable operations of all
electrical and Communications-Electronics equipment, systems and subsystems, devices,
ordnance, and fuels within their intended electromagnetic operational environment (EMOE),
including effects on personnel. Electromagnetic Environmental Effects and spectrum
supportability considerations apply to all platforms, systems, subsystems, facilities, weapons,
electric or electronic equipment, networks, sensors, fuels, and ordnance, (hereinafter referred to
as equipment, systems and platforms) developed, procured, acquired, operated, and maintained
by the Navy including Commercial Items and Non-Developmental Items. Since this instruction
has been widely revised it should be read in its entirety. Summary of changes are reflected in
subparagraphs 1a through 1c.
a. Replaces the “Spectrum Supportability Determination” requirement with the Spectrum
Supportability Risk Assessment (SSRA), as defined within reference (a).
b. Adds explicit responsibilities for Commander, Naval Information Warfare Systems
Command (COMNAVWARSYSCOM), and Commander, Naval Facilities Engineering
Command (COMNAVFACENGCOM).
c. The previous OPNAVINST 2400.20F, contained five enclosures. Detailed procedures in
enclosures (2), (3) and (5) are codified in NTP-6F. The Department of Defense (DoD)
Dictionary of Military and Associated Terms replaced the list of electromagnetic environmental
effects and spectrum definitions previously contained in enclosure (1) and enclosure (4).
2. Cancellation. OPNAVINST 2400.20F
