Final answer: Both the Department of the Navy Correspondence Manual (SECNAV M-5216.5) and the Marine Corps Supplement to the Department of the Navy Correspondence Manual (MCO 5216.20) provide correspondence procedures and format guidance used in the Navy and Marine Corps.
The correct format for the reference line in a standard naval letter is a) Ref: (a) MCO 5216.16B. Here is a step-by-step explanation to understand the correct formatting: Ref: The word 'Reference' should be abbreviated as 'Ref,' with only the 'R' capitalized.
Left and right margins are always set at 1 inch. Times New Roman 12 pitch font is preferred for Navy correspondence. Single spacing between lines. Double spacing between paragraphs/subparagraphs. Send editable electronic copy to Admin for formatting/editing.
The part of a standard letter that provides the title and address of the command or activity is called the letterhead. The letterhead typically includes the name of the organization or individual, their contact information, and sometimes a logo or design element.
REFERENCES The primary reference is the Department of the Navy Correspondence Manualalso known as the Correspondence Manual. A supplement to the Manual is Marine Corps Order 5216.20 published as Chapter 13 of the Correspondence Manual.