S-57 object finder (Maritime Charting)

This document allows you to see how S-57 objects correlate to feature classes in the nautical geodatabase. The S-57 objects are in alphabetical order. The table shows the object, its description, the feature class where the object exists as a subtype, the subtype value, and the product for which it is used. If the object is a subtype in more than one features class, the feature classes are listed in bullets. The subtype value is listed in parentheses next to the feature class. Products are also listed in bullets if there is more than one.

An object acronym in lowercase is an AML extension to IHO-approved attributes and has been created specifically for AML use. The Product column also shows which AML profile the objects belong to.

Learn more about ENC and AML products

Note:

IHO Transfer Standard for Digital Hydrographic Data Publication S-57 Edition 3.1 - November 2000, Appendix A - IHO Object Catalogue Chapters 1 and 2 discusses objects with S-57 attributes.

A

S-57 object	Description	Feature class (FCsubtype value)	Product
ACHARE	Anchorage Area	RegulatedAreasAndLimitsA (1) RegulatedAreasAndLimitsP (1)	ENC AML: ESB
ACHBRT	Anchor Berth	RegulatedAreasAndLimitsA (5) RegulatedAreasAndLimitsP (5)	ENC
ADMARE	Administration Area Named	RegulatedAreasAndLimitsA (10)	ENC AML: MFF
AIRARE	Airport Area	CulturalFeaturesA (1) CulturalFeaturesP (1)	ENC AML: RAL
airres	Airspace Restriction	MilitaryFeaturesA (1)	AML: RAL
ARCSLN	Archipelagic Sea Lane	RegulatedAreasAndLimitsA (15)	ENC
ASLXIS	Archipelagic Sea Lane Axis	RegulatedAreasAndLimitsL (1)	ENC
atsctl	ATS Route Centerline	MilitaryFeaturesL (1)	AML: RAL

B

S-57 object	Description	Feature class (FCsubtype value)	Product
bchare	Beach Survey	SeabedA (1) SeabedP (1)	AML: ESB
bchext	Beach Exit	MilitaryFeaturesL (5) MilitaryFeaturesP (1)	AML: ESB
bchprf	Beach Profile	SeabedL (1)	AML: ESB
BCNCAR	Beacon Cardinal	AidsToNavigationP (1)	ENC AML: MFF
BCNISD	Beacon Isolated Danger	AidsToNavigationP (5)	ENC AML: MFF
BCNLAT	Beacon Lateral	AidsToNavigationP (10)	ENC AML: MFF
BCNSAW	Beacon Safe Water	AidsToNavigationP (15)	ENC AML: MFF
BCNSPP	Beacon Special Purpose	AidsToNavigationP (20)	ENC AML: MFF
BERTHS	Berth	PortsAndServicesA (1) PortsAndServicesL (1) PortsAndServicesP (1)	ENC
botmft	Bottom Feature	Seabed A (5) Seabed L (5) Seabed P (5)	AML: ESB
BOYCAR	Buoy Cardinal	AidsToNavigationP (25)	ENC AML: MFF
BOYINB	Buoy Installation	AidsToNavigationP (30)	ENC AML: MFF
BOYISD	Buoy Isolated Danger	AidsToNavigationP (35)	ENC AML: MFF
BOYLAT	Buoy Lateral	AidsToNavigationP (40)	ENC AML: MFF
BOYSAW	Buoy Safe Water	AidsToNavigationP (45)	ENC AML: MFF
BOYSPP	Buoy Special Purpose	AidsToNavigationP (50)	ENC AML: MFF
bprare	Burial Probability Area	SeabedA (10)	AML: ESB
brgare	Iceberg Area	IceFeaturesA (1)	AML: ESB
BRIDGE	Bridge	CulturalFeaturesA (5) CulturalFeaturesL (1) CulturalFeaturesP (5)	ENC AML: ESB
btdare	Bottom Tactical Data Area	MilitaryFeaturesA (5)	AML: ESB
BUAARE	Built Up Area	CulturalFeaturesA (10) CulturalFeaturesP (10)	ENC AML: ESB, MFF
BUISGL	Building Single	CulturalFeaturesA (15) CulturalFeaturesP (15)	ENC AML: ESB

C

S-57 object	Description	Feature class (FCsubtype value)	Product
CANALS	Canal	PortsAndServicesA (5) PortsAndServicesL (5)	ENC
CAUSWY	Causeway	PortsAndServicesA (10) PortsAndServicesL (10)	ENC
CBLARE	Cable Area	OffshoreInstallationsA (1)	ENC AML: ESB, MFF
CBLOHD	Cable Overhead	CulturalFeaturesL (5)	ENC AML: ESB
CBLSUB	Cable Submarine	OffshoreInstallationsL (1)	ENC AML: ESB, MFF
CGUSTA	Coast Guard Station	PortsAndServicesP (5)	ENC AML: MFF
CHKPNT	Check Point	PortsAndServicesA (15) PortsAndServicesP (10)	ENC AML: RAL
COALNE	Coastline	CoastlineL (1)	ENC AML: ESB, MFF
CONVYR	Conveyor	CulturalFeaturesA (20) CulturalFeaturesL (10)	ENC AML: ESB
CONZNE	Contiguous Zone	RegulatedAreasAndLimitsA (5)	ENC AML: RAL
COSARE	Continental Shelf Area	RegulatedAreasAndLimitsA (25)	ENC AML: RAL
CRANES	Cranes	PortsAndServicesA (20) PortsAndServicesP (15)	ENC
ctlasp	Controlled Airspace	MilitaryFeaturesA (15) MilitaryFeaturesL (10)	AML: RAL
CTNARE	Caution Area	DangersA (1) DangersP (1)	ENC
CTRPNT	Control Point	CulturalFeaturesP (20)	ENC AML: ESB
CTSARE	Cargo Transhipment Area	RegulatedAreasAndLimitsA (30) RegulatedAreasAndLimitsP (10)	ENC
CURENT	Current Non-Gravitational	TidesAndVariationsP (1)	ENC AML: ESB
CUSZNE	Custom Zone	RegulatedAreasAndLimitsA (35)	ENC
C_AGGR	Aggregation	PLTS_COLLECTIONS (1)	ENC AML: ESB, MFF, RAL
C_ASSO	Association	PLTS_COLLECTIONS (5)	ENC

D

S-57 object	Description	Feature class (FCsubtype value)	Product
DAMCON	Dam	CulturalFeaturesA (25) CulturalFeaturesL (15) CulturalFeaturesP (25)	ENC
DAYMAR	Day Mark	AidsToNavigationP (55)	ENC
DEPARE	Depth Area	DepthsA (1) DepthsL (1)	ENC AML: CLB
DEPCNT	Depth Contour	DepthsL (5)	ENC AML: CLB
DISMAR	Distance Mark	PortsAndServicesP (20)	ENC
divloc	Diving Location	DangersA (5) DangersP (5)	AML: ESB
DMPGRD	Dumping Ground	RegulatedAreasAndLimitsA (40) RegulatedAreasAndLimitsP (15)	ENC AML: ESB
DOCARE	Dock Area	PortsAndServicesA (25)	ENC
DRGARE	Dredged Area	DepthsA (5)	ENC
drpzne	Drop Zone	MilitaryFeaturesA (20) MilitaryFeaturesP (5)	AML: ESB
DRYDOC	Dry Dock	PortsAndServicesA (30)	ENC
DWRTCL	Deep Water Route Centerline	TracksAndRoutesL (1)	ENC AML: MFF
DWRTPT	Deep Water Route Part	TracksAndRoutesA (1)	ENC AML: MFF
DYKCON	Dyke	PortsAndServicesA (35) PortsAndServicesL (15)	ENC

E

S-57 object	Description	Feature class (FCsubtype value)	Product
envare	Environmentally Sensitive Area	RegulatedAreasAndLimitsA (45) RegulatedAreasAndLimitsP (20)	AML: ESB
EXEZNE	Exclusive Economic Zone	RegulatedAreasAndLimitsA (50)	ENC AML: RAL

F

S-57 object	Description	Feature class (FCsubtype value)	Product
FAIRWY	Fairway	TracksAndRoutesA (5)	ENC
FERYRT	Ferry Route	TracksAndRoutesA (10) TracksAndRoutesL (5)	ENC AML: RAL
FLODOC	Floating Dock	PortsAndServicesA (40) PortsAndServicesL (20)	ENC
FNCLNE	Fence Wall	CulturalFeaturesL (20)	ENC
FOGSIG	Fog Signal	AidsToNavigationP (60)	ENC
FORSTC	Fortified Structure	CulturalFeaturesA (30) CulturalFeaturesL (25) CulturalFeaturesP (30)	ENC AML: ESB
FRPARE	Free Port Area	RegulatedAreasAndLimitsA (55)	ENC
FSHFAC	Fishing Facility	DangersA (10) DangersL (1) DangersP (10)	ENC AML: ESB
FSHGRD	Fishing Ground	RegulatedAreasAndLimitsA (60)	ENC AML: MFF
FSHZNE	Fishery Zone	RegulatedAreasAndLimitsA (65)	ENC AML: RAL

G

S-57 object	Description	Feature class (FCsubtype value)	Product
GATCON	Gate	PortsAndServicesA (45) PortsAndServicesL (25) PortsAndServicesP (25)	ENC
GRIDRN	Gridiron	PortsAndServicesA (50) PortsAndServicesP (30)	ENC

H

S-57 object	Description	Feature class (FCsubtype value)	Product
histob	Contact History	DangersP (15)	AML: SBO
HRBARE	Harbour Area Administrative	RegulatedAreasAndLimitsA (70)	ENC AML: MFF
HRBFAC	Harbour Facility	PortsAndServicesA (55) PortsAndServicesP (35)	ENC AML: MFF
HULKES	Hulkes	PortsAndServicesA (60) PortsAndServicesP (40)	ENC

I

S-57 object	Description	Feature class (FCsubtype value)	Product
iceadv	Ice Advisory Area	IceFeaturesA (5)	AML: RAL
ICEARE	Ice Area	IceFeaturesA (15)	ENC AML: MFF
icebrg	Iceberg	IceFeaturesA (20) IceFeaturesP (1)	AML: ESB
icelea	Ice Lead	IceFeaturesA (25) IceFeaturesL (1)	AML: ESB
icelin	Ice Line	IceFeaturesL (5)	AML: ESB
icemov	Ice Movement	IceFeaturesA (30) IceFeaturesP (5)	AML: ESB
icepol	Ice Polynya	IceFeaturesA (35)	AML: ESB
icerte	Ice Route	IceFeaturesL (10)	AML: RAL
ICNARE	Incineration Area	RegulatedAreasAndLimitsA (75) RegulatedAreasAndLimitsP (25)	ENC
imgare	Area of Imagery Coverage	MilitaryFeaturesA (25)	AML: ESB
intwtr	Internal Waters Area	RegulatedAreasAndLimitsA (80)	AML: RAL
iscour	Impact Scour	SeabedP (10)	AML: LBO
ISTZNE	Inshore Traffic Zone	TracksAndRoutesA (15)	ENC AML: MFF

L

S-57 object	Description	Feature class (FCsubtype value)	Product
LAKARE	Lake	NaturalFeaturesA (1)	ENC
LIGHTS	Light	AidsToNavigationP (65)	ENC AML: ESB, MFF
LITFLT	Light Float	AidsToNavigationP (70)	ENC AML: MFF
LITVES	Light Vessel	AidsToNavigationP (75)	ENC AML: MFF
LNDARE	Land Area	NaturalFeaturesA (5) NaturalFeaturesL (1) NaturalFeaturesP (1)	ENC AML: MFF
LNDELV	Land Elevation	NaturalFeaturesL (5) NaturalFeaturesP (5)	ENC AML: ESB
lndice	Land Ice	IceFeaturesA (40)	AML: ESB
LNDMRK	Landmark	CulturalFeaturesA (35) CulturalFeaturesL (30) CulturalFeaturesP (35)	ENC AML: ESB
lndplc	Landing Place	MilitaryFeaturesP (10)	AML: ESB
lndpnt	Landing Point	MilitaryFeaturesP (15)	AML: ESB
LNDRGN	Land Region	NaturalFeaturesA (10) NaturalFeaturesP (10)	ENC AML: ESB
lndste	Landing Site	MilitaryFeaturesA (30)	AML: ESB
lndstp	Landing Strip	MilitaryFeaturesA (10)	AML: ESB
lndzne	Landing Zone	MilitaryFeaturesA (35)	AML: ESB
lndare	Landing Area	MilitaryFeaturesA (40)	AML: ESB
LOCMAG	Local Magnetic Anomaly	TidesAndVariationsA (5) TidesAndVariationsL (5) TidesAndVariationsP (5)	ENC AML: MFF
LOGPON	Log Pond	RegulatedAreasAndLimitsA (85) RegulatedAreasAndLimitsP (30)	ENC
LOKBSN	Lock Basin	PortsAndServicesA (65)	ENC
lsrare	Leisure Activity Area	RegulatedAreasAndLimitsA (90)	AML: ESB

M

S-57 object	Description	Feature class (FCsubtype value)	Product
M_ACCY	Accuracy of Data	MetaDataA (1)	ENC AML: CLB, ESB, LBO, MFF, RAL, SBO
m_clas	Security Classification Information	MetaDataA (5)	AML: CLB, ESB, LBO, MFF, RAL, SBO
m_conf	Completeness for the product specification	MetaDataA (10)	AML: CLB, ESB, LBO, MFF, RAL, SBO
M_COVR	Coverage	MetaDataA (15)	ENC AML: CLB, ESB, LBO, MFF, RAL, SBO
M_CSCL	Compilation Scale of Data	MetaDataA (20)	ENC AML: CLB, ESB, LBO, MFF, RAL, SBO
m_line	Defined Straight Lines	MetaDataL (1)	AML: MFF, RAL
M_HOPA	Horizontal Datum Shift Parameters	MetaDataA (25)	ENC
M_NPUB	Nautical Publication Information	MetaDataA (30) MetaDataP (1)	ENC AML: CLB, ESB, LBO, MFF, RAL, SBO
M_NSYS	Navigational System of Marks	MetaDataA (35)	ENC
m_prod	Product Information	MetaDataA (70)	AML: CLB, ESB, LBO, MFF, RAL, SBO
M_QUAL	Quality of Data	MetaDataA (40)	ENC AML: CLB, ESB, LBO, MFF, RAL, SBO
M_SDAT	Sounding Datum	MetaDataA (45)	ENC AML: CLB, ESB, LBO, MFF, RAL, SBO
M_SREL	Survey Reliability	MetaDataA (50) MetaDataL (5)	ENC AML: CLB, ESB, LBO, MFF, RAL, SBO
M_VDAT	Vertical Datum of Data	MetaDataA (55)	ENC AML: CLB, ESB, LBO, MFF, RAL, SBO
m_vers	Vertical Datum Shift Area	MetaDataP (60)	AML: ESB
MAGVAR	Magnetic Variation	TidesAndVariationsA (10) TidesAndVariationsL (10) TidesAndVariationsP (10)	ENC AML: MFF
MARCUL	Marine Farm Culture	RegulatedAreasAndLimitsA (95) RegulatedAreasAndLimitsL (25) RegulatedAreasAndLimitsP (35)	ENC AML: MFF
marman	Marine Management Area	MilitaryFeaturesA (45)	AML: RAL
mcmare	MCM Area	MilitaryFeaturesA (50)	AML: ESB
mexasp	Military Exercise Airspace	MilitaryFeaturesA (55)	AML: RAL
MIPARE	Military Practice Area	MilitaryFeaturesA (60) MilitaryFeaturesP (30)	ENC AML: RAL
MORFAC	Mooring Warping Facility	PortsAndServicesA (70) PortsAndServicesL (30) PortsAndServicesP (45)	ENC AML: ESB
msiare	Maritime Safety Information Area	RegulatedAreasAndLimitsA (100)	AML: RAL

N

S-57 object	Description	Feature class (FCsubtype value)	Product
navaid	Navigational Aid	AidsToNavigationP (80)	AML: RAL
NAVLNE	Navigation Line	TracksAndRoutesL (10)	ENC
NEWOBJ	New Object	UserDefinedFeaturesA (1) UserDefinedFeaturesL (1) UserDefinedFeaturesP (1)	ENC

O

S-57 object	Description	Feature class (FCsubtype value)	Product
OBSTRN	Obstruction	DangersA (15) DangersL (5) DangersP (20)	ENC AML: LBO, MFF
OFSPLF	Offshore Platform	OffshoreInstallationsA (5) OffshoreInstallationsP (1)	ENC AML: MFF
OILBAR	Oil Barrier	DangersL (10)	ENC
OSPARE	Offshore Production Area	OffshoreInstallationsA (10)	ENC AML: MFF

P

S-57 object	Description	Feature class (FCsubtype value)	Product
patare	Patrol Area	MilitaryFeaturesA (65)	AML: RAL
pfdare	Performance Data Area	MilitaryFeaturesA (70)	AML: ESB
PILBOP	Pilot Boarding Place	PortsAndServicesA (75) PortsAndServicesP (50)	ENC
PILPNT	Pile	PortsAndServicesP (55)	ENC
PIPARE	Pipeline Area	OffshoreInstallationsA (15) OffshoreInstallationsP (5)	ENC AML: ESB, MFF
PIPOHD	Pipeline Overhead	CulturalFeaturesL (35)	ENC AML: ESB
PIPSOL	Pipeline Submarine On Land	OffshoreInstallationsL (5) OffshoreInstallationsP (10)	ENC AML: ESB, MFF
PONTON	Pontoon	PortsAndServicesA (80) PortsAndServicesL (35)	ENC
PRCARE	Precautionary Area	TracksAndRoutesA (20) TracksAndRoutesP (1)	ENC AML: MFF
PRDARE	Production Storage Area	CulturalFeaturesA (40) CulturalFeaturesP (40)	ENC AML: MFF
PYLONS	Pylon Bridge Support	CulturalFeaturesA (45) CulturalFeaturesP (45)	ENC

Q

S-57 object	Description	Feature class (FCsubtype value)	Product
qroute	Q-Route Leg	MilitaryFeaturesL (15)	AML: RAL

R

S-57 object	Description	Feature class (FCsubtype value)	Product
RADLNE	Radar Line	TracksAndRoutesL (15)	ENC
RADRFL	Radar Reflector	AidsToNavigationP (85)	ENC
RADRNG	Radar Range	TracksAndRoutesA (25)	ENC AML: RAL
RADSTA	Radar Station	AidsToNavigationP (90)	ENC AML: RAL
RAILWY	Railway	CulturalFeaturesL (40)	ENC
RAPIDS	Rapids	NaturalFeaturesA (15) NaturalFeaturesL (10) NaturalFeaturesP (15)	ENC
RCRTCL	Recommended Route Centerline	TracksAndRoutesL (20)	ENC
RCTLPT	Recommended Traffic Lane Part	TracksAndRoutesA (30) TracksAndRoutesP (5)	ENC
rdoare	Radio Broadcast Area	TracksAndRoutesA (35)	AML: RAL
RDOCAL	Radio Calling In Point	TracksAndRoutesL (25) TracksAndRoutesP (10)	ENC AML: RAL
RDOSTA	Radio Station	AidsToNavigationP (95)	ENC AML: RAL
RECTRC	Recommended Track	TracksAndRoutesA (40) TracksAndRoutesL (30)	ENC
RESARE	Restricted Area	RegulatedAreasAndLimitsA (105)	ENC AML: RAL
resloc	Resource Location	MilitaryFeaturesA (75) MilitaryFeaturesP (35)	AML: ESB
RETRFL	Retro Reflector	AidsToNavigationP (100)	ENC
RIVERS	River	NaturalFeaturesA (20) NaturalFeaturesL (15)	ENC AML: ESB
rkdare	Risk Data Area	MilitaryFeaturesA (80)	AML: ESB
ROADWY	Road	CulturalFeaturesA (50) CulturalFeaturesL (45) CulturalFeaturesP (50)	ENC AML: ESB
RSCSTA	Rescue Station	PortsAndServicesP (60)	ENC AML: MFF
RTPBCN	Radar Transponder Beacon	AidsToNavigationP (105)	ENC
RUNWAY	Runway	CulturalFeaturesA (55) CulturalFeaturesL (50) CulturalFeaturesP (55)	ENC

S

S-57 object	Description	Feature class (FCsubtype value)	Product
SBDARE	Seabed Area	SeabedA (15) SeabedL (10) SeabedP (15)	ENC
SEAARE	Sea Area Named Water	NaturalFeaturesA (25) NaturalFeaturesP (20)	ENC AML: CLB, ESB, MFF
seaice	Sea Ice	IceFeaturesA (45)	AML: ESB
sedlay	Geological Layer	SeabedA (20) SeabedP (20)	AML: ESB
seiare	Seismic Activity Area	SeabedA (25)	AML: ESB
senanm	Sensor Anomaly	DangersP (25)	AML: LBO
shlloc	Shelter Location	MilitaryFeaturesP (40)	AML: ESB
SILTNK	Silo Tank	CulturalFeaturesA (60) CulturalFeaturesP (60)	ENC
SISTAT	Signal Station Traffic	PortsAndServicesP (65)	ENC
SISTAW	Signal Station Warning	PortsAndServicesP (70)	ENC AML: MFF
SLCONS	Shoreline Construction	CoastlineA (1) CoastlineL (5) CoastlineP (1)	ENC AML: ESB
SLOGRD	Sloping Ground	NaturalFeaturesA (30) NaturalFeaturesP (25)	ENC
SLOTOP	Slope Topline	NaturalFeaturesL (20)	ENC
smalbo	Small Bottom Objects	DangersP (30)	AML: SBO
SMCFAC	Small Craft Facility	PortsAndServicesA (85) PortsAndServicesP (75)	ENC
SNDWAV	Sand Waves	SeabedA (30) SeabedL (15) SeabedP (25)	ENC
SOUNDG	Soundings	SoundingsP (1)	ENC AML: CLB
SPLARE	Sea Plane Landing Area	RegulatedAreasAndLimitsA (110) RegulatedAreasAndLimitsP (45)	ENC
SPRING	Spring	SeabedP (30)	ENC
STSLNE	Straight Territorial Sea Baseline	RegulatedAreasAndLimitsL (30)	ENC AML: RAL
SUBTLN	Submarine Transit Lane	TracksAndRoutesA (45)	ENC AML: RAL
SWPARE	Swept Area	DepthsA (10)	ENC

T

S-57 object	Description	Feature class (FCsubtype value)	Product
T_HMON	Tide Harmonic Prediction	TidesAndVariationsA (15) TidesAndVariationsP (15)	ENC AML: MFF
T_NHMN	Tide Non-Harmonic Prediction	TidesAndVariationsA (20) TidesAndVariationsP (20)	ENC AML: MFF
T_TIMS	Tide Time Series	TidesAndVariationsA (25) TidesAndVariationsP (25)	ENC AML: MFF
TS_FEB	Tidal Stream Flood Ebb	TidesAndVariationsA (35) TidesAndVariationsP (30)	ENC AML: MFF
TS_PAD	Tidal Stream Panel Data	TidesAndVariationsA (40) TidesAndVariationsP (35)	ENC AML: MFF
TS_PNH	Tidal Stream Non-Harmonic Prediction	TidesAndVariationsA (45) TidesAndVariationsP (40)	ENC AML: MFF
TS_PRH	Tidal Stream Harmonic Prediction	TidesAndVariationsA (50) TidesAndVariationsP (45)	ENC AML: MFF
TS_TIS	Tidal Stream Time Series	TidesAndVariationsA (55) TidesAndVariationsP (50)	ENC AML: MFF
TESARE	Territorial Sea Area	RegulatedAreasAndLimitsA (115)	ENC AML: RAL
tfcrte	Traffic Route	TracksAndRoutesL (35)	AML: RAL
TIDEWY	Tideway	TidesAndVariationsA (30) TidesAndVariationsL (15)	ENC
TOPMAR	Topmark	AidsToNavigationP (110)	ENC
trfare	Trafficability Area	MilitaryFeaturesA (85)	AML: ESB
TSELNE	Traffic Separation Line	TracksAndRoutesL (40)	ENC AML: MFF
TSEZNE	Traffic Separation Zone	TracksAndRoutesA (50)	ENC AML: MFF
TSSBND	Traffic Separation Scheme Boundary	TracksAndRoutesL (45)	ENC AML: MFF
TSSCRS	Traffic Separation Scheme Crossing	TracksAndRoutesA (55)	ENC AML: MFF
TSSLPT	Traffic Separation Scheme Lane Part	TracksAndRoutesA (60)	ENC AML: MFF
TSSRON	Traffic Separation Scheme Roundabout	TracksAndRoutesA (65)	ENC AML: MFF
TUNNEL	Tunnel	CulturalFeaturesA (65) CulturalFeaturesL (55) CulturalFeaturesP (65)	ENC
turnpt	Turning Point	AidsToNavigationP (115)	AML: RAL
twlscr	Trawl Scour	SeabedA (35) SeabedL (20)	AML: ESB
TWRTPT	Two Way Route	TracksAndRoutesA (70)	ENC

U

S-57 object	Description	Feature class (FCsubtype value)	Product
UNSARE	Unsurveyed Area	DepthsA (15)	ENC
UWTROC	Underwater Awash Rock	DangersP (35)	ENC AML: LBO
u_defd	User Defined	UserDefinedFeaturesA (5) UserDefinedFeaturesL (5) UserDefinedFeaturesP (5)	AML: CLB, ESB, LBO, MFF, RAL, SBO

V

S-57 object	Description	Feature class (FCsubtype value)	Product
VEGATN	Vegetation	NaturalFeaturesA (35) NaturalFeaturesL (25) NaturalFeaturesP (30)	ENC
viewpt	Viewpoint	MilitaryFeaturesP (45)	AML: ESB, SBO

W

S-57 object	Description	Feature class (FCsubtype value)	Product
WATFAL	Waterfall	NaturalFeaturesL (30) NaturalFeaturesP (35)	ENC
WATTUR	Water Turbulence	DangersA (20) DangersL (15) DangersP (40)	ENC
WEDKLP	Weed Kelp	SeabedA (40) SeabedP (35)	ENC AML: ESB
WRECKS	Wrecks	DangersA (25) DangersP (45)	ENC AML: LBO