Vessels sailing under the Guyana Country Flag are required to have on board this flag as part of flag state requirements that derive from maritime regulations in the International Code of Signals and the International Safety Management (ISM) Code. These codes are published by the International Maritime Organization (IMO) as an ongoing effort to reinforce maritime safety procedures and communications to the international maritime community. Fleet management companies and ship owners are responsible to ensure that each vessel in their respective fleets have the appropriate flag signage onboard to be in compliance. This flag is used to identify the flag state a vessel is sailing under and to communicate with other vessels under the provisions of the International Code of Signals.
The Guyana Country Flag is represented by a series of triangles. A red equilateral triangle is based against the hoist, or left side of the flag and outlined by a thin black triangle of a similar shape and size. A yellow triangle reaches from 1/4 the way from the base of the black and stretches across the flag to just left of the fly, or right side. A white triangle outlines the yellow, reaching the fly side of the flag with it's tip. This design forms two triangles, one at the top and one at the bottom of the flag which are colored green. These fill out toward the fly side, pointing toward the hoist along the top and bottom. The Guyana Country Flag incorporates a ratio of 3:5, height to length, respectively. It was officially adopted in 1966 after the nation gained independence from the United Kingdom. The green symbolizes the forests of Guyana, while the red references vitality of the people. Yellow refers to plentiful mineral resources, while black dignifies endurance and white depicts the native rivers.