Final answer:
You can depart from the United States Coast Guard navigation rules under specific circumstances and exemptions outlined in the regulations.
Step-by-step explanation:
In general, you are allowed to depart from the United States Coast Guard (USCG) navigation rules when there are specific circumstances or exemptions outlined in the regulations. For example, the USCG allows vessels to deviate from the navigation rules in order to avoid immediate danger, to render assistance to other vessels, or to comply with the rules of a special navigation area. Additionally, vessels may be granted exemptions by the USCG under certain conditions. It's important to always consult the USCG navigation rules and regulations for specific situations.