Editing Trinity House (section)

===Vessels===
====Ships====
[[File:THV Patricia, off Cowes, Isle of Wight, UK.jpg|thumb|THV ''Patricia'', off Cowes, Isle of Wight (September 2017)]]
[[File:THV Alert.jpg|thumb|THV ''Alert'' entering Harwich Harbour on 6 September 2009]]
Trinity House [[Watercraft|vessel]]s have the [[ship prefix]] THV. {{As of|2020}} three such vessels operate around the coast of England, Wales and the Channel Islands.<ref>{{cite web| url=http://www.trinityhouse.co.uk/commercial_activities/commercial_services/vessel_services.html| title=Commercial Services| publisher=Trinity House| access-date=2008-08-02| url-status=dead| archive-url=https://web.archive.org/web/20080607072446/http://www.trinityhouse.co.uk/commercial_activities/commercial_services/vessel_services.html| archive-date=7 June 2008| df=dmy-all}}</ref>
*[[THV Patricia|THV ''Patricia'']] (1982) is an {{convert|86.3|m|adj=on}} [[Buoy tender|multi-functional tender]] that carries out maintenance work on navigation aids, towing, wreck location and marking. She has a [[helipad|helicopter-landing pad]], a 20-tonne main crane and 28-tonne bollard pull and towing [[winch]].
*[[THV Alert|THV ''Alert'']] (2006) is a {{convert|39.3|m|adj=on}} [[Patrol boat|Rapid Intervention Vessel]], able to respond rapidly to maritime incidents off the southeast coast of England. She is capable of buoy handling, wreck marking and towing. Fitted with multibeam and side-scan hydrographic surveying capability and DP1 dynamic positioning, ''Alert'' can be utilised as a research platform with a large working deck.
*[[THV Galatea|THV ''Galatea'']] (2007) is an {{convert|84|m|adj=on}} [[Lighthouse tender|multi-functional tender]] with a [[Helipad|helicopter-landing pad]]. Fitted with a range of high specification survey equipment and a 30-tonne capacity [[Crane (machine)|crane]], [[Azimuth thruster|azimuthing propellers]], two 750&nbsp;kW [[Maneuvering thruster|bow thruster]]s and DP2 dynamic positioning, ''Galatea'' replaced the 1987-built THV ''Mermaid''.

====Boats====
The Corporation operates a number of small boats, mostly functioning as [[Ship's tender|tender]]s to Trinity House vessels as described in the section above. The historic right of Trinity House to escort the [[monarch|Sovereign]] when travelling by ship in [[territorial waters]] is still exercised on [[Ceremony|ceremonial occasion]]s. On the River Thames and inland waterways the duty is carried out by the vessel designated ''Trinity House No 1 Boat'',<ref>{{cite web| title=HM The Queen's Diamond Jubilee Celebrations| year=2012| url=http://www.trinityhouse.co.uk/news_info/press_releases/2012/hm_queens_diamond_jubilee_celebrations.html| publisher=Trinity House| access-date=4 June 2012| url-status=dead| archive-url=https://web.archive.org/web/20120603055328/http://www.trinityhouse.co.uk/news_info/press_releases/2012/hm_queens_diamond_jubilee_celebrations.html| archive-date=3 June 2012| df=dmy-all}}</ref> a name which designates any boat assigned to this duty; {{As of|2020|lc=y}} a tender of THV ''Galatea'' is used for such ceremonial duties.<ref>The designation "Tender to THV ''Galatea''" is clearly visible beneath the Royal Standard in [http://www.trinityhouse.co.uk/news_info/press_releases/2012/hm_queens_diamond_jubilee_celebrations.html this photograph] {{webarchive|url=https://web.archive.org/web/20120603055328/http://www.trinityhouse.co.uk/news_info/press_releases/2012/hm_queens_diamond_jubilee_celebrations.html |date=3 June 2012 }}.</ref> However, for the [[Thames Diamond Jubilee Pageant]] on 3 June 2012, this boat had the name "T.H. No 1 Boat" painted onto the bow (port and starboard) whilst carrying the Master (the Princess Royal) in the jubilee flotilla.<ref>{{cite web | last=Bartram | first=Graham | title=A Visual Guide to the Flags Used in the Thames Diamond Jubilee Pageant | url=http://www.flaginstitute.org/Thames_Pageant_Flag_Guide.pdf | page=9 | publisher=[[The Flag Institute]] | access-date=4 June 2012 | url-status=dead | archive-url=https://web.archive.org/web/20140307100005/http://www.flaginstitute.org/Thames_Pageant_Flag_Guide.pdf | archive-date=7 March 2014 | df=dmy-all }}</ref> On 8 November 2014, Trinity House entered a float for the annual [[Lord Mayor's Show]] in the [[City of London]], consisting of a heavy low-loader lorry, with the ''Trinity House No 1 Boat'' mounted on the low-loader trailer as an exhibit.