Final answer:
To find the proper procedures for constructing a standard Navy letter, you should refer to OPNAVINST 5216.7, which is the U.S. Navy's standard for administrative correspondence.
Step-by-step explanation:
The correct reference for finding the proper procedures for constructing a standard Navy letter is option B, OPNAVINST 5216.7, which is the U.S. Navy's standard for administrative correspondence. It provides detailed guidelines on formatting, structure, and content for official Navy letters. Option A, NAVPERS 15560, is a Navy personnel manual and does not specifically address letter construction. Option C, SECNAVINST 5216.5, is the Secretary of the Navy's instruction on Navy correspondence, but it does not cover the specific procedures for constructing a standard letter. Option D, MILPERSMAN, is the Navy's manual on personnel matters and is also unrelated to letter construction.