On 28 June 2014, vessels at sea are requested to fly flags and ensigns at half-mast and vessels
The UK Maritime & COastguard Agency has issued Marine Information Note referring to all ship owners, ship operators, terminal operators, port authorities to inform that on 28 June 2014, vessels at sea are requested to fly flags and ensigns at half-mast and vessels in harbours are encouraged to sound a signal at a designated time of 1700 h UTC.
This is request from the Secretary-General of the International Maritime Organizationand the United Nations Educational, Scientific and Cultural Organization (UNESCO) to indicate mourning in remembrance of the Centenary of World War 1.
Vessels moored in harbours are encouraged to use a remembrance sound signal on thesame day as may be decided and permitted by the local port authorities, at 1700 h UTC(1900 h Middle European Time/MET), being the hour of the first shot fired in the conflict, tocommemorate the Centenary.
Source: UK MCA