Coast guard
It is tasked with the broader enforcement of maritime laws, especially against smuggling, illegal fishing, drug trafficking and piracy. It patrols the country's coastline, and is also involved in maritime search and rescue (SAR) missions, as well as the protection of the marine environment.
The Uruguayan Coast Guard also frequently patrols coast areas via-foot and on patrol vehicles which they are assigned jurisdictions which are called Subprefecturas. Prefectura is also responsible for the International Port of Montevideo operability.
Even though the Uruguayan Coast guard is a Military Organization they frequently help out law enforcement agencies.
It must also maintain the safety of navigation and be a maritime authority on rivers, the Atlantic Ocean, The River Plate and lakes in the jurisdiction of the Navy and intervene in the flagging of vessels.
In 2015, there are plans for the Uruguayan Coast Guard to pass and depend entirely on the Ministry of Interior, meaning it would not be a military unit anymore.

Vietnam: Vietnam Coast Guard (VCG; Vietnamese: Cảnh sát biển Việt Nam) is directly under the administration of the Vietnamese Government, and it patrols and controls in accordance with the laws of the Socialist Republic of Vietnam and international treaties concerned such as the United Nations Convention on the Law of the Sea (UNCLOS). Besides maritime search and rescue (SAR) missions, Vietnam Coast Guard missions include protection the sovereignty and jurisdiction of the waters of Vietnam; protection of natural resources; prevention of environmental pollution; detection and prevention of acts of smuggling, piracy and illegal transportation and trafficking of illegal narcotics or precursors.
Besides the mentioned "official coast guard", Vietnam also organizes an alternative maritime law enforcement force, which is the Vietnam Fisheries Surveillance. While theoretically focusing at counter illegal fishing behaviors and administer fisheries activities in the Vietnamese water corresponding to its name, the Fisheries Surveillance also shares VCG's missions to perform SAR and represents Vietnam's national interest and sovereignty exercises in the sea with its strong fleet of more than 100 medium-sized patrol vessels.

See also: Border guard
Chief Coastguard
Maritime Security Regimes
Port security

References: 

External links: 
Download records of service of the UK Coastguard 1816-1947
Coast Guard Navik DB Admit Card 2020