Winds, storms, tropical storms; sea state

Restricted visibility

Ice

Abnormal tides

AI/3.2 Navigational warnings involving

Land- or seamarks

Drifting objects

Electronic navigational aids

NAV 46/INF.4

ANNEX

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Seabottom characteristics, wrecks

Miscellaneous

.5.1 Cable, pipe and seismic / hydrographic operations

Diving operations, tows, dredging operations

Tanker transshipment

Off-shore installations, rig moves

Defective locks or bridges

Military operations

Fishery

AI/3.3 Environmental protection communications

AI/4 Pilotage

AI/4.1 Pilot request

AI/4.2 Embarking / disembarking pilot

AI/4.3 Tug request

AI/5 Specials

AI/5.1 Helicopter operations

AI/5.2 Ice-breaker operations

Ice-breaker request

Ice-breaker assistance for convoy

Iice-breaker assistance in close-coupled towing

AI/6 Vessel Traffic Service (VTS) Standard Phrases

AI/6.1 Phrases for acquiring and providing data for a traffic image

Acquiring and providing routine traffic data

Acquiring and providing distress traffic data

AI/6.2 Phrases for providing VTS services

Information service

Navigational warnings

Navigational information

Traffic information

Route information

Hydrographic information

Electronic navigational aids information

Meteorological warnings

Meteorological information

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