Marc Garneau's patch commemorates Canada's participation in Space Shuttle Mission STS-77. It features Space Shuttle Endeavour flying at night over an ocean that reflects a Canadian maple leaf moon. A nautical theme is the primary motif of this patch.
Endeavour is depicted in its Spartan release poise. Marc Garneau retrieved the satellite with the Canadarm. Lights in the payload bay and cabin illuminate the SPACEHAB payloads, the Canadarm, and the Spartan satellite. Canadian experiments NANO-GAS and ACTORS are illustrated by blue dots in the cargo bay.
The ocean as viewed from orbit, reflecting moonlight, depicts “where dots” that represent crystalline molecules assembling themselves into a pattern similar to the commercial float zone furnace (CFZF) logo. A star in the ocean is actually a starfish, representing an onboard Canadian experiment.
The green airglow and auroras extend above the horizon, evoking sailing vessels, a tribute to Garneau's naval experience.
Two silver and three white stars represent the total number of Canadian spaceflights up to and including this one, the fifth.