A grotto blue vertical rectangle embroidered device arched convexly at top and bottom and edged with a 1/8 inch (.32 cm) scarlet border, an Alaskan flag in background with a polar bear in foreground walking on snow, leaving behind footprints. Attached above the rectangle, an ultramarine blue scroll inscribed "NANOOK" in white letters and edged with a 1/8 inch (.32 cm) scarlet border. Attached below the rectangle, an ultramarine blue scroll inscribed "BATTALION" in white letters and edged with a 1/8 inch (.32 cm) scarlet border. The overall dimensions are 3 1/2 inches (8.89 cm) in height by 2 5/8 inches (6.67 cm) in width.
Red, blue and white are the schools colors. The polar bear is the school mascot.
The shoulder sleeve insignia was authorized 20 October 2004.