WWNWS Flashcards
Describe contents of Navarea Warnings?
- Casualties to lights, fog signals and buoys affecting main shipping lanes
- The presence of dangerous wrecks in or near main shipping lanes and, if relevant, their marking
- Establishment of major new aids to navigation or significant changes to existing ones when such establishment or change might be misleading to shipping
- The presence of large unwieldy tows in congested waters
- Drifting mines
- Areas where search and rescue (SAR) and anti-pollution operations are being carried out (for avoidance of such areas)
- At the request of the controlling MRCC, notification of ships and aircraft on or over the open sea reported in distress, seriously overdue or missing
- The presence of newly discovered rocks, shoals, reefs and wrecks likely to constitute a danger to shipping, and, if relevant, their marking
- Unexpected alteration or suspension of established routes
- Cable- or pipe-laying activities, the towing of large submerged objects for research or exploration purposes, the employment of manned or unmanned submersibles, or other underwater operations constituting potential dangers in or near shipping lanes
- Establishment of offshore structures in or near shipping lanes
- Significant malfunctioning of radio navigation services and shore-based maritime safety information radio or satellite service
- Information concerning special operations which might affect the safety of shipping, sometimes over wide areas, e.g. naval exercises, missile firings, space missions, nuclear tests, etc
Describe contents of Coastal Warnings?
Coastal warnings promulgate information which is necessary for safe navigation within a given region. Coastal warnings should normally provide sufficient information for safe navigation to seaward of the fairway buoy or pilot station and should not be restricted to main shipping lanes
Outline the main principles and the purpose of WWNW?
The World-Wide Navigational Warning Service (WWNWS), is a co-ordinated global service for the promulgation of navigational warnings. Navigational warnings are designed to give the mariner early information of important incidents which may constitute a danger to navigation.
State the obligation of a Master with regards to WWNWS?
Masters are required to make arrangements to ensure that all navigational warnings or other matters relating to safety of life at sea are brought to their notice, or that of the navigating officer on watch at the time, immediately on receipt.
Principles of SafetyNET?
SafetyNET is an international automatic direct-printing satellite-based service for the promulgation of Maritime Safety Information (MSI), navigational and meteorological warnings, meteorological forecasts, Search and Rescue (SAR) information and other urgent safety-related messages to ships.
Principles of NAVTEX?
Navtex (Navigational Telex) is an international automated medium frequency direct-printing service for delivery of navigational and meteorological warnings and forecasts, as well as urgent maritime safety information to ships.
Navtex - Message types, 5 Categories?
- Failure of and changes to major navigational aids
- Failure of and changes to long-range electronic position fixing systems (GPS/LORAN-C)
- Newly discovered wrecks or natural hazards
- Areas where SAR or anti-pollution operations are taking place (for avoidance of such areas)
- Seismic surveys and other underwater activities in certain areas
- Positions of mobile drilling rigs (RIGLISTS) and other oil/gas related activities.
Navtex Receivers Messages which can/cannot be rejected?
Should not Be:
- C Ice Information
- E Met Forcasts
- Pilotage Information
- G AIS Messages
Cannot Be Rejected:
- A - Navigational warnings
- B - Meteorological warnings
- D - Search and rescue information, and pirate warnings.
- L Navigational warnings — additional to letter A
