A. WRECK INFORMATION – ABBREVIATIONS

NOTE:	Prior to 15.12.98
	All Geographical Positions are quoted in Degrees, Minutes, Seconds.
	Since 18.12.98
	All Geographical Positions are quoted in Degrees, Minutes and decimals of a Minute.

STATE OF WRECK

ABEY	Existance of wreck in doubt. Not shown on charts.
DEAD	Not detected by repeated surveys, therefore considered not to exist
LIFT	A salvaged wreck
LIVE	Wreck considered to exist.

TYPE

A/C	Aircraft
FF	Fishermans Fastener
FV	Fishing Vessel
HMT	HM Trawler
LTV	Light Vessel
MFV	Motor Fishing Vessel
MS	Motor Ship
MV	Motor Vessel
REQ	Requisitioned
SS	Steamship

CHART SYMBOL

DW	Dangerous Wreck
DWP	Dangerous Wrecks shown in dotted outline
ED	Existence Doubtful
F	Foul
FA	Foul Area/Foul Anchorage
FF	Fishermans Fastener
FSW	Foul, least depth by wire sweep
HIS	Historic/Protected Wreck Site
LEG	Legend
MT	Mast showing
MTS	Masts showing
NDW	Non-dangerous Wreck
OB	Obstruction
OBL	Obstruction Legend
OBP	Obstruction/s, shape of obstruction using dotted/pecked outline
OSW	Obstruction, least depth by wire sweep
PA	Position Approximate
PD	Position Doubtful
ST	Stranded wreck, any part of hull or superstructure showing at chart datum
STF	Stranded wreck, shape of wreck in firm outline, always shows
STP	Stranded wreck, shape of wreck in pecked outline, dries
SW	Wreck, least depth by wire sweep
USC	Unsurveyed wreck with safe clearance depth
WH	Wellhead
WK	Wreck with least depth indicated/or no depth specified
WKG	Wreckage
WKS	Wrecks

DEPTH PREFIX

D	Drying Height above Chart Datum
H	Height above Mean High Water

HORIZONTAL DATUM

ABI	Abidjan, Ivory Coast
ADI	Adindan , Sudan (30th Meridian )
ADS	Astro 1956 (S. Pedro, Paulo, Atol de Rocas)
AIN	Ain el Abd, Saudi Arabia
AMM	Montserrat M36 Astro (1975)
ANG	Camacupa Base SW End (Angola)
ANT	Antigua dos Astro A14 (1977)
ANU	Anguilla A4 Astro (1956)
ARF/ARC	Arc (1950), Africa
ARS/ARC	Arc (1960), Africa
ASX	Secor Astro (1966)
ATB	Athens
AUA	Australian Geodetic
BAT	Batavia , Java, Jakarta
BBE	Bathurst Base East End Datum, Gambia
BEK	Bekaa Base South End, Lebanon
BEQ	Bermuda (1943)
BER	Bermuda (1957)
BID/BISS	Bissau Base North West End Pillar/Guinea Bissau
BOO	Bogota Observatorio, Colombia
BRH	British Honduras (1922)
BUR	Bukit Rimpah, Bangka I. , Indonesia
CAI	Campo Inchause
CAJ	Castelo di Sao Jorge (Lisboa) [Bessel]
CAP	Cape Datum, South Africa
CDF	Castania
CEY	Ceylon
CHI/CHIN	Chinese Datum
COA	Corrego Alegre (Brazil)
COP	Copenhagen , Runde Taarn Datum
CRA	Santa Cruz , Solomon Is. Cruz Astro (1947)
CZX	Santa Cruz , Solomon Is. DOS66 CZX6 (66-72)
DAK	Dakar, Senegal
DCL	St. Lucia DCS-3 Astro (1973)
DOB	Guadal Canal , Solomon Is. Gux 1 Astro
DOM	Dominica M12 Astro (1983), Less Antilles
DOS	Directorate of Overseas Survey
EGT	Egypt 1907
EUR/EUD	European (1950) (ED50)
EUT	European Terrestial Reference System 1989 (WGS’84 compatible)
FAH	PD (Oman) (Fahud)
FIN	Final (1958) (Iran parts of)
FJD/FIJI	Fiji (1986) Datum
FJI	Fiji (1956) Datum
FOT	St. Kitts and Nevis K12 Astro (1975)
GCA	Grand Cayman GC1 Astro (IAGS 1959)
GDA	German
GEN	Genova (Genoa 1908)
GEO	Geodetic Datum (1949)
GIZ	Gizo Island , New Georgia DOS (1968)
GOE	Goenoeng Dempo, Sumatra, Indonesia
GSE	Goenoeng Segara (1933), Kalimantan
GTA	Grand Turk Astro (1943)
GUA	Guam (1963)
HEL/FIN	Finnish (Helsinki)
HER/HERM	Hermanskogel (Vienna)
HIT	Hito XVIII Astro, Prov. S. Chilean 1963
HJO/HJOR	Hjorsey (Iceland)
HKD/HK	Hong Kong (1963)
HOK/HK	Hong Kong (1980)
HTN	Koshizan (Hu-Tzu-Shan)
IGB	IGN (North Block, Bellevue ) (Vanuatu New Hebrides )
IGD	IGN 1947-1951 (Djibouti)
IGN	Instuit Geographique National (1957) Datum, Nouvelle Caledonie
IGT	IGN (South Block, Tanna) (Vanuatu New Hebrides )
IND/SOI	Indian Datum (Survey of India )
INH	Indian Datum (1975) Thailand
INT	International 1924
IRL/ING	Ireland N (1965)/ Ireland Nat. Grid
ITA/ITAJ	Itarare N Base, Itajuba – Santa Catarina ( Brazil)
ITAL	Italy
JAK	Jakarta
JEU	British Honduras (1922)
KAN/KAND	Kanawala (1933) (Ceylon)
KEA/KDR	Revised Kertau
LAP/LPOU	Le Pouce (Mauritius)
LAT	Latvia
LCA	L. Cayman & Cayman Brac LC5 Astro (1961)
LIB	Liberia (1964) (Roberts Field Astro)
LIS/POR	Lisboa (Sao Jorge) [Int]/>Portugal
LOB	Lobito Base NE End ( Angola)
LUZ	Luzon (1911)
MDD	Madrid (1853)
MER/MERC	Merchich (Morocco)
MET	Mercury Datum
MG	Minas Gerais (Brazil)
MIN	Minna Nigeria
MOB	Old Monte Mario
MOD/MM	Monte Mario (1940) (Italy)
MOG	Mogadishu
MOZ	Madzansua (Zumbo), (Mozambique)
MVS	Viti Levu (1916)
NAD	North American Datum
NAE/NHNR	Revised Nahrwan (Bahrain, Qatar )
NAG/NAH/NHNR	Nahrwan (Iraq, Kuwait , S. Arabia )
NAN	Nanking (1960)
NAP/TRIN	Naparima (1955) (Trinidad)
NAS/NAD	North American Datum (1927) (NAD27)
NAX/NAD	North American Datum (1983) (NAD83)
NIG	Nigerian National
NOU	Noumea, Nouvelle Caledonie (IGN 1972)
NUM	Vanua Levu, Fiji
OGB/NG	Ordnance Survey of Great Britain (1936)
OGC/NG	Ordnance Survey of Great Britain (1970) (Scientific Network)
OGD/NG	Ordnance Survey of Great Britain Datum (1980 Adjustment)
OHA	Old Hawaiian
OSI/ING	Ordnance Survey of Ireland (Eire)
OSL	Norwegian (Old)
OSN	Norwegian (New)
PAC/PAN	Panama Colon
PED	Beijing (1954)
PHA	Phare D’Ayabelle
PLN/PICO	Pico de la Nieves (Canary Islands)
POE	Port Etienne, Mauritania
POS	New Porto Santo
POT/POL	Poland/Potsdam
PRI	Principe, Sinal Domorro do Papagio
PRP/PSAD	Provisional South American (1956) (PSAD56)
PUK	Pulkovo 1942 System
PUR	Puerto Rico (1927)
REU	IGN 47-49, Reunion
REY	Reykjavik
ROE	Old Monte Mario
SAG	Sainte Anne I. (IGN 1951-52) Guadeloupe
SAN	South American (1969)
SAP/FALK	Falkland Islands (1943) (Sapper Hill)
SCK	Schwarzeck Namibia
SEI	South East Island ( Seychelles)
SFO	San Fernando
SHO	Martinique SHOM (1984)
SIL	Sierra Leone 1960
SMG	Grenada GS8 Astro (1953), Less Antilles
SOO	Sao Tome
STO/SED	Swedish
SWA	Schwarzeck South West Africa
TEC/TETE	Tete (Mozambique)
TIB/TIMB	Timbalai (1948) [Bessel], Sabah
TIL/TIMB	Timbalai (1948) [Everest], Sarawak, Brunei
TOK	Tokyo
UND	Undetermined
USS/USSR	Russia
VAR	Varesmae
VID	HMS Vidal (1967) Astro
VIN	Vienna (Hermanskogel)
VIT	Viti Levu (1916)
VLE	IGN (South Block, Tanna)
VOA	Fort Charlotte , St. Vincent
WGC/WGS	WGS (1972) - World Geodetic Survey
WGD/WGS	WGS (1984) – World Geodetic Survey
XXX	Ordnance Survey of Great Britain and Ordnance Survey of Ireland

POSITIONING DETAILS

20, 50, 100, 500	Position accuracy in metres
ARG	Argo
C	Compass Cross Bearings
CR	Compass Bearing and Radar Range
D	Decca
DGPS	Differential Global Positioning System
DL	Distance Line
E	Estimated
ED	Existence Doubtful
EDM	Electronic Distance Measuring Systems:  Trisponder  MRB 201  Motorola
EDOM	Electronic Optical Distance Measuring Systems:  AGF  Geodimeter
GPS	Global Positioning System
HF	Hi-fix (Parabolic) or Hydrotrac
HF6	Hi-fix 6 (Parabolic)
2HF	Two-Range Hi-fix
HSA	Horizontal Sextant Angle
HYPE	Hyper-fix
L	Lambda (Parabolic)
2L	Two-range Lambda
L(A)	Loran Chain A
L(C)	Loran Chain C
LOP	Lines of position
OM	Omega Navigation
PA	Position Approximate
PD	Position Doubtful
PHOT	Air Photography
PU8	Pulse 8
R	Radar (Navigational)
RA	Radar (Alpine or other Precise Radar)
SF	Sea Fix
SINS	Ships Inertial Navigational System
SN	SATNAV (Satellite Navigation)
SYL	Syledis
TOR	Toran
TRI	Decca Trisponder
TRIG	Triangulation

VERTICAL DATUM

ILW	Indian Spring Low Water
LAT	Lowest Astronomical Tide
MLS	Mean Low Water Springs
MLW	Mean Low Water
MSL	Mean Sea Level

DEPTH METHOD

D	Divers Report
DCS3	Dual Control Side Scan Sonar
DH	Divers (Hydrographic Training or Supervised) Report
E	Estimated
ES	Echo Sounder
O	Swept to clearance by Oropsea
SWD	Swept by Wire (Two Ship/Boat Drift/Drag Sweep)
SWS	Swept by Wire (Single Ship/Boat Drift Sweep)
VS	Vertical Scan

TONNAGE

B	Builders Measurement
D	Displacement
G	Gross
N	Net

MARKERS

B	Black
CAN	Can
CAR	Cardinal
CONL	Conical
E	East
F	Fixed
FL	Flashing
FL( )	Group Flashing (number)
G	Green
INT	Interrupted
ISO	Isophase
ISOL	Isolated Danger Buoy
N	North
OCC	Occulting
Q	Quick Flashing
R	Red
RAFL	Radar Reflector
S	South
SPH	Spherical
VQ	Very Quick Flashing
W	West orWhite
Y	Yellow

AUTHORITIES

ARG	Argentina
AUS	Australia
BANG	Bangladesh
BOT	Board of Trade
BSAC	British Sub-aqua Club
BTDB	British Transport Dock Board
CAN	Canada
C-IN-C	Commander in Chief
DD	Dehra Dun (India)
DODS	Dictionary of Disasters at Sea
E GER/GDR	East German
ECES	East Coast of England Survey Unit
FR	France
GER	German
HBR	Harbour
HBR COM	Harbour Commission
HI	Hydrographic Instruction
HN	Hydrographic Note
HK	Hong Kong
INDO	Indonesia
ISS	Inshore Survey Squadron
ITAL	Italy
LL	Lloyds List
LL WW1	Lloyds List World War 1 Losses
LL WW2	Lloyds List World War 2 Losses
MOT	Ministry of Transport
MSD	Modern Shipping Disasters 1963-1987
NETH	Netherlands
NOIC	Naval Officer in Charge
NP	Naval Party
NOR	Norway
NZ	New Zealand
OPS	Operations
PAK	Pakistan
PGLS	Persian Gulf Lighting Service
PLA	Port of London Authority
PRC	Peoples Republic of China
REP des Cr et Ep	Repertoire des Croches et Epaves
	(French History of Fisherman’s Fasteners and Wrecks )
R-of-S	Report of Survey
SA	South Africa
SCES	South Coast of England Survey Unit
SIBI	Shipwreck Index of British Isles
SII	Shipwreck Index of Ireland
SP	Spain
SING/PSA	Singapore/Port Singapore Authority
SRN	Ships of the Royal Navy
SWED	Sweden
TELECOM	Telephone Communication
TH	Trinity House
TURK	Turkey
US	United States
W GER/FRG	West Germany/Federal Republic of Germany
WO	Wrecks Officer
WW1 SL	World War 1 Shipping Losses
WW2 SL	World War II Shipping Losses
YUGO	Yugoslavia

SURVEYING DETAILS

A/S	Asdic Sonar
B	Beam
B & D	Bearing and Distance
BN	Beacon
BRG	Bearing
BR STD	Branch Standard; minor information to be shown on next New Edition
C	Cables
CINC	Commercial in Confidence
D	Draught
DEG/S	Degree/s
DIRN	Direction
DTD/DD	Dated
EDN	Edition
E/S	Echo Sounder
FMS	Fathoms
FT	Feet
GEN	General
G/S	Green Standard; minor information to be shown on next New Edition
GSC	Good Sonar Contact
H or HT	Height
L	Length
LC	Large Correction; a major chart update similar to a New Edition
LTHO	Lighthouse
LTV	Light Vessel
M	Miles
MTRS	Metres
NC	New Chart
NCA	No Chart Action
NE	New Edition, a major chart update
NFA	No Further Action
NM	Notice to Mariner, a textual chart correction
NM BLOCK	Notice to Mariner Block, a graphical paste-on chart correction
NSC	Non-Submarine Contact
NVGP	Navigation Aid to Geographic Position by Computation
POSN	Position
REP/REPD	Reported
RK	Rock
R/P	Revised Print; minor information to be shown on next New Edition
R/S	Red Standard; minor information to be shown on next New Edition
SON CON	Sonar Contact
SQ. DATE	Square date; minor information to be shown on next New Edition or Large Correction
[U]	Uncorrected
UTM	Universal Transverse Mercator
YDS	Yards

B. EXPLANATION OF WRECK FIELDS

Latitude & Longitude at top of record:	Latitude and Longitude stated for largest scale chart, followed by horizontal datum to which positionis referred, see abbreviations document for explanation.
Square Number:	For ease of use in UKHO the world is divided into a series of numbered blocks.
Wreck Number:	Each record has a unique identity number.
Classification:	Either unclassified or commercial in confidence. Data suppliers can request that information given toUKHO be classified as commercial in confidence for 5 years. Their data will be edited from wreck recordssupplied.
Symbol:	relates to how wreck is show on British Admiralty charts. See abbreviations document for explanationof various symbols.
Largest Scale Chart:	number of largest scale British Admiralty chart on which wreck plots.
Charting Comments:	Various comments are used such as scale too small to show, too deep to chart etc, any legend which ischarted alongside a wreck is also given here.
Old Number:	Prior to 15.12.1998 when a new database format was introduced the individual wreck. numbers were relatedto wreck squares. This field will be empty for wrecks recorded after 15.12.1998.
Category:	relates to type of wreck eg stranded, dangerous, non-dangerous if known.
WGS84 Position:	Latitude and Longitude related to World Geodetic System 1984.
WGS84 Origin:	Defines whether WGS’84 position was supplied, or whether it was calculated from information given, eitherby the block shift stated on the British Admiralty chart, or in Home Waters by a more accurate 3D CartesianShift which converts Ordnance Survey of Great Britain 1936 to WGS’84.
Horizontal Datum:	The datum to which the position at the top of the record is referred.
Position Method:	Method used to obtain position of wreck. See abbreviations document for explanation.
Position Quality:	gives an indication of whether wreck position has been surveyed, is considered to be precisely known,considered to be approximate, unreliable etc.
Position Accuracy:	numerical value given in metres if position fixing method known.
Area at Largest Scale:	gives indication if the record is charted as an area symbol. Eg. foul area or dangerous wreck shownas dotted outline. Limits or area covered will be stated in the surveying details.
Depth:	least depth in metres over wreck or obstruction, related to vertical datum of chart.
Drying Height:	drying height of stranded wreck or obstruction given in metres, related to vertical datum of chart,usually Lowest Astronomical Tide in Home Waters .
Height:	Wreck or obstruction is always showing. Height is given in metres related to Mean High Water Springs.
General Depth:	seabed depth in metres.
Vertical Datum:	datum to which depths are related eg. Lowest Atronomical Tide in Home Waters, Mean Sea Level in Baltic.
Depth Method:	how least depth over wreck was obtained.
Depth Quality:	gives an indication of reliability of depth over wreck, eg whether least depth is known, unknown ora safe clearance.
Depth Accuracy:	value in metres, this field is not used.
Conspic Visual:	states whether a stranded wreck is visually conspicuous.
Conspic Radar:	states whether a stranded wreck is radar conspicuous.
Historic:	states whether a wreck is of historic importance. Those in British Waters covered by Statuary Instrumentare listed in Annual Notice to Mariner 16.
Existence Doubtful:	states whether a wreck or obstruction’s existence is considered doubtful. Item would be charted withlegend ED on the chart.
Non Sub Contact:	if Yes, this is a record which has not been identified but is known not to be a submarine.
Last Amended:	gives date on which data was added that affected how a record was charted.
Position Last Amended:	gives date on which the position of a wreck was changed.
Position Last:	states the previous position that recorded at the top of the wreck record.
Name:	registered name of vessel at time of sinking
Type:	type of vesel eg submarine, steamship etc. See abbreviations document for explanation.
Flag:	country in which vessel was registered at time of sinking.
Dimensions:	length, beam and draught given in metres.
Tonnage:	value usually given as gross for vessels, except warships and submarines which is given as displacement.
Cargo:	brief details of cargo given if known.
Date Sunk:	date of vessel’s sinking, stranding etc.
Sonar Dimensions:	if a wreck has been surveyed its length, width and height as determined by side scan sonar are shownin metres.
Orientation:	bearing on degrees that wreck lies on seabed.
Magnetic Anomaly:	gives an indication of whether a reading obtained by magnetometer was slight, moderate or strong.
Debris Field:	gives an indication of extent of debris scattered on seabed around wreck or obstruction.
Scour:	depth in metres from seabed to bottom of scour, also length and orienation if known.
Markers:	details of any buoyage or beacons marking wreck or obstruction.
General Comments:	short description of condition of wreck eg. well broken, listing to port, capsized.
Circumstances of Loss:	if known details given of why vessel sank or stranded, year built and builders, passage details, ownersat time of loss, lives lost, previous registered names.
Surveying Details:	all details known about vessel or obstruction since first notification to UKHO. File reference for anypapers relating to record given (usually beginning H or HH), date when entry was made on record, detailsof information given in file, authority for information will be given either in curved brackets or asa foreign government chart number or survey, action taken to correct British Admiralty chart eg NM ????/03,New Edition, etc. See abbreviations document for explanation.