OBSTRN

GEO OBJECT CLASSES

Feature: Obstruction

Acronym: OBSTRN

Camel case: Obstruction

Spatial: point, curve, surface

Simple Attributes: CATOBS; CONDTN; EXPSOU; HEIGHT; maximumPermittedDraught; QUASOU; REPDAT; STATUS; TECSOU; VALSOU; VERLEN; verticalUncertainty; WATLEV; SCAMAX; SCAMIN;

Complex Attributes: fixedDateRange; featureName; PeriodicDateRange; SourceIndication; TXTCON;

Associated information object classes: NATINF; RCMDTS; REGLTS; RESDES;

Definition:

In marine navigation, anything that hinders or prevents movement, especially anything that endangers or prevents passage of a vessel. The term is usually used to refer to an isolated danger to navigation, such as a sunken rock or pinnacle.

References:

INT 1: ???????????

M-3:

M-4: ???????????

IHO Dictionary - S32

Remarks:

See the S-101 DCEG clauses 13.6.1 for general encoding rules.
Specific rules for S-122 (MPA):

• S-122 data sets can encode only Obstruction features corresponding to fish havens or artificial reefs (category of obstruction = 5 or 14).
• Features that are considered to be subsurface Fish Aggregating Devices (FAD) must be encoded as Obstruction, with category of obstruction = 5 (fish haven), unless the FAD is a vessel which has been deliberately sunk to form a fish haven, which should be encoded as a Wreck feature. (ref. 13.6.1 S-101 DCEG - April 2014 baseline).

Distinction:

Depth Area; Fishing Facility; Foul Ground; Marine Farm/Fulture; Underwater Rock; Water Turbulence; Wreck

Justification:
S-101 feature used in S-122 to encode fish havens and artificial reefs.

Comment:

The following S-101 attributes are not bound to Obstruction features in the S-122 application schema and should not be encoded in S-122 datasets. Applications should ignore their presence in Obstruction features which are part of S-122 datasets.

• PRODCT product
• NATSUR nature of surface