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Dangerous to Navigation (DTN)

DGIF baseline 2026-1, the latest. Earlier baselines: timemap.

RDF: dtn.ttl

Name

dangerousToNavigation

Datatype

Boolean

Definition

An indication that a hazard in a waterbody is considered to be dangerous to surface navigation.

Description

For example, broken piles, a rock formation, or a reef in moderately deep waters. For large vessels a depth of less than 20 metres is generally considered to be dangerous.

Accepted

2013-10-18

Defined by

DFDD

Used by

• AA054 Non-water Well
• BH250 Shallow Water Area
• BD135 Artificial Reef
• BD050 Foul Ground
• BD003 Large Bottom Object
• BD002 Small Bottom Object
• BD130 Hazardous Rock
• BD180 Wreck
• BD061 Aquatic Vegetation
• BD120 Reef

Source: DGIF 2026-1 QEA model, DGIWG. Standard: DGIWG 206-3. Licence: CC BY 4.0, © DGIWG.