Podcast
Questions and Answers
Which of the following are included in the outline briefing for a passage plan?
Which of the following are included in the outline briefing for a passage plan?
What is the purpose of the Limiting Danger Line (LDL)?
What is the purpose of the Limiting Danger Line (LDL)?
To identify the closest point of a vessel to danger at any time, considering the height of the tide.
Transferring tracks between paper charts requires consistent distances and methods.
Transferring tracks between paper charts requires consistent distances and methods.
True
What is the primary concern when planning for fog in coastal navigation?
What is the primary concern when planning for fog in coastal navigation?
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In heavy weather, what is generally considered a safer approach?
In heavy weather, what is generally considered a safer approach?
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Which of the following are examples of 'national' routing systems?
Which of the following are examples of 'national' routing systems?
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Visual fixing by night is impossible without navigational lights.
Visual fixing by night is impossible without navigational lights.
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What does the term 'Innocent Passage' refer to?
What does the term 'Innocent Passage' refer to?
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All former mined areas are now considered safe for surface navigation.
All former mined areas are now considered safe for surface navigation.
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What is the primary danger associated with anchoring, trawling, or seabed operations in former mined areas?
What is the primary danger associated with anchoring, trawling, or seabed operations in former mined areas?
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Study Notes
Chapter 1: Planning Coastal Navigation
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Objectives:
- Students learn to prepare Navplan.
- Students learn to think and search for the best sailing route.
- Students learn about under keel clearance and safety distances from navigational hazards.
- Students learn how to create a passage plan.
- Students learn about Traffic Separation Schemes (TSS) areas and precautionary areas.
- Students learn about planning coastal navigation in coral regions.
1- Check Lists and Navplan Preparations (a) Programme
- Dates: Establish dates of the intended passage as soon as possible.
- Outline Briefing: Outline the Speed of Advance (SOA) and any significant factors (e.g., hurricane season). The Navigation Officer briefs the Commanding Officer (CO) and Operations Officer on the passage concepts.
- CO's Input: The Commanding Officer can input suggestions into the outline plan.
1- Check Lists and Navplan Preparations (b) Appraisal
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Appraisal Items: The Navigation Officer's Workbook details:
- Heights of Tide (HOT) and under keel clearances.
- Limiting Danger Line (LDL).
- Estimated Time of Departure (ETDs)/arrival (ETAs) and refined Speed of Advance (SOA).
- Predicted tidal streams/currents with their strength and direction.
- Statistical meteorology (sea state, wind, fog, ice, currents).
- Traffic Separation Schemes (TSS), shipping lanes/traffic density, fishing vessels.
- Exercise opportunities/exercise areas/submarine transit lanes/air lanes.
- Rendezvous/Replenishment at Sea (RAS) requirements/planning.
- Maritime Jurisdiction/innocent passage/diplomatic clearance.
- Intelligence requirements/planning.
- Restrictions on high-power radar/sonar/communications.
- Mined areas and munitions picked up at sea.
- Temporary/permanent Notices to Mariners/Radio Warning Logs.
2- Criteria for Route Selection (a) Planning for Fog in Coastal Navigation
- Speed: The effect of fog on the Speed of Advance (SOA) should be considered during planning, especially in narrow/congested waters.
- Operational Navaids: Use of operational radio navaids (e.g., GPS/DGPS, Radar, Echo Sounder) is considered for coastal fog navigation.
2- Criteria for Route Selection (b) Planning for Heavy Weather in Coastal Navigation
- Speed: The effect of heavy weather on the Speed of Advance (SOA) should be considered during planning, particularly in exposed waters.
- Shelter and Sea-Room: The likely direction of heavy weather and opportunities for shelter/searoom to leeward should be addressed.
Other Important Considerations
- Traffic Routing Systems: Coastal navigation routes may follow International Maritime Organization (IMO) or national routing systems (e.g., TSS). Regulations must be observed.
- Visual Fixing by Night: Islands and headlands (even without lights) can be identified as visual fixings at night if background illumination is available.
- Clearance from Coast/Offshore Dangers: Considerations for clearances from coast and offshore hazards.
- Under Keel Clearances and LDLs: Under keel clearances and Limiting Danger Lines (LDLs) are critical factors in route selection.
- ETDs/ETAs and Refined SOA-Factors: Calculations & factors to consider when establishing ETD/ETA & refined SOA.
- Territorial Seas & Internal Waters: Vessels may enter territorial seas or internal waters, and the rights of innocent passage apply.
- Mine Danger Areas: Former mined areas may pose a danger to ships and are marked on Admiralty charts as Mine Danger Areas.
- Anchoring, Trawling and Seabed Activity: Caution is advised regarding anchoring, trawling, and seabed operations in areas previously used for mining to prevent encountering unexploded ordnance.
- Cross-Checking Information: All navigational information sources should be cross-checked for reliability.
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Description
Test your knowledge on planning coastal navigation with a focus on creating Navplans, determining sailing routes, and understanding safety distances from navigational hazards. This quiz covers essential concepts like Traffic Separation Schemes and considerations for coral regions. Perfect for aspiring navigators and maritime professionals.
