Podcast
Questions and Answers
The US Sailing Directions are the responsibility of which agency?
The US Sailing Directions are the responsibility of which agency?
- National Geospatial-Intelligence Agency (NGA) (correct)
- United States Coast Guard (USCG)
- Army Corps of Engineers
- National Oceanic and Atmospheric Administration (NOAA)
What is the primary benefit of regularly updating nautical charts and publications through corrections?
What is the primary benefit of regularly updating nautical charts and publications through corrections?
- Reducing the time needed for passage planning
- Increasing the resale value of the charts
- Minimizing the amount of manual chart correction required (correct)
- Ensuring compliance with international maritime law
Which type of information would a mariner not typically find within a traditional tide table?
Which type of information would a mariner not typically find within a traditional tide table?
- Detailed weather forecasts (correct)
- Predicted tidal heights
- Daily high and low tide times
- Tidal current information
Admiralty Sailing Directions offer route information specifically tailored for which type of vessel?
Admiralty Sailing Directions offer route information specifically tailored for which type of vessel?
What is the second officer's primary responsibility in ensuring nautical charts are current?
What is the second officer's primary responsibility in ensuring nautical charts are current?
Sailing Directions primarily serve which of the following purposes?
Sailing Directions primarily serve which of the following purposes?
Tide tables primarily provide mariners with which crucial pieces of information?
Tide tables primarily provide mariners with which crucial pieces of information?
What is the primary way in which enroute sailing directions supplement nautical charts for navigation?
What is the primary way in which enroute sailing directions supplement nautical charts for navigation?
Why is meticulous maintenance of chart correction records crucial for safe navigation?
Why is meticulous maintenance of chart correction records crucial for safe navigation?
What is a common method for disseminating urgent, short-term navigational safety information (valid for less than a month)?
What is a common method for disseminating urgent, short-term navigational safety information (valid for less than a month)?
Flashcards
NGA
NGA
Responsible for US Sailing Directions.
Converting nautical charts
Converting nautical charts
To reduce the amount of chart correction work.
Purpose of Sailing Directions
Purpose of Sailing Directions
Provides written descriptions of coastal routes and port approaches.
Tide Tables
Tide Tables
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Sailing Directions supplement...
Sailing Directions supplement...
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Information valid for less than a month
Information valid for less than a month
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Tide levels are relative to...
Tide levels are relative to...
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Sailing Directions relate to nautical charts by
Sailing Directions relate to nautical charts by
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Tide table predictions give...
Tide table predictions give...
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Charts correction status indicated on...
Charts correction status indicated on...
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Study Notes
- The agency responsible for the US sailing directions is the NGA (National Geospatial Intelligence Agency).
- The purpose of converting nautical charts and publications is to reduce the amount of chart correction work.
- Detailed weather forecasts are not typically found in a tide table.
- Admiralty sailing directions provide information on routes for seagoing vessels.
- The second officer is primarily responsible for keeping nautical charts up to date.
- The primary purpose of sailing directions is to provide written descriptions of coastal routes and port approaches.
- Tide tables primarily provide information about high and low tide times and heights.
- Sailing directions (en route) primarily supplement the largest scale charts of the area in navigational tools.
- Maintaining accurate records of chart correction is crucial to comply with safety regulations, reduce the workload of the navigator, and conserve nautical charts and publications.
- Information valid for less than a month is disseminated as a radio navigation warning or local notices.
- Tide levels are typically given relative to a low water vertical datum.
- Admiralty sailing directions are produced by the United Kingdom Hydrographic Office (UKHO).
- Notices to mariners are typically received weekly.
- Charts that have been corrected for the operating are referred to as ready charts.
- Planning guides in the US sailing directions provide general features of ocean basins.
- Magenta ink should be used for permanent corrections on nautical charts.
- Information in tide tables is based on normal meteorological conditions.
- Geographic regions within sailing directions publications are known as sectors.
- Sailing directions supplement and enhance chart data in relation to nautical charts.
- The primary purpose of a chart and publication correction record card system is to minimize chart correction work.
- A ship's log book is not a component of the chart and publication correction record system.
- A pencil is the writing instrument generally used for temporary and preliminary (T&P) correction.
- The Defence Mapping Agency Hydrographic/Topographic Center (DMAHTC), now the NGA, publishes the United States sailing directions.
- Ship manifest is not typically found in sailing directions.
- Tide table predictions are best estimates that may need correction.
- Table levels are typically given relative to a low water vertical datum.
- A Temporary Notice to Mariners (T) is a notice valid for a limited period.
- British Admiralty nautical charts are primarily supplemented by the Admiralty sailing directions.
- Charts and publications not immediately required for use should be updated as the area of operation changes or as directed by the commanding officer.
- Detailed descriptions of a specific harbor's facilities can be found in an en route volume of the US sailing directions.
- Corrections are sometimes needed for tide table predictions because of variations in atmospheric conditions.
- Unusual changes in atmospheric temperature and pressure need to be considered when using tide table predictions.
- Mean Lower Low Water (MLLW) is the correct example of a low water vertical datum.
- Temporary and Preliminary corrections are most prone to being overlooked.
- One month is the minimum validity period for a Temporary Notice to Mariners.
- The chart's correction status is usually indicated at the bottom of the chart.
- When a new Notice to Mariners arrives, the navigator creates a card for each affected chart and notes the correction using the card system.
- When using a chart, the navigator uses the Chart/Publication Correction Record Card to make corrections on the chart.
- En route volumes describe coastlines, ports, and harbors, while Planning Guides describe ocean basins in the US Sailing Directions.
- All Notice to Mariners corrections affecting the chart should be recorded on the chart/publication correction record card.
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