USNS William McLean (T-AKE 12) is a Lewis and Clark-class dry cargo ship of the United States Navy, named in honor of William McLean, a United States Navy physicist, who conceived and developed the heat-seeking Sidewinder missile.

[4] USNS William McLean has a shield "Per fess nebuly enhanced, two piles reversed in chief point issuant from dexter and sinister base, Azure and Argent, all counterchanged, in base a compass rose Gules bearing a globe Celeste with grid lines of the second; a bordure of steel Proper."

Her crest is "From a wreath Argent and Azure two steel anchors erect Proper, superimposed by a seahorse rampant of the second gorged with a collar Gules charged with the Roman numerals "XII" Argent, all below an arced rope Proper tied to each anchor ring."

Her motto is "A scroll, with ends behind base of the missiles, Azure doubled Gules and inscribed with "SI VIS PACEM, PARA BELLUM" (IF YOU WANT PEACE, PREPARE FOR THE WAR) Argent."

On 22 December 2016 the USNS William McLean returned to Naval Weapons Station Yorktown from a 47-day surge deployment to the United States Sixth Fleet in the Mediterranean Sea.