CHARTS AND PUBLICATIONS.Grunt Productions 2007
General
Accurate representation of land.
Parallel and meridians at right angles.
Grunt Productions 2007
Rhumb lines appear as straight lines.
Angles between rhumb lines on earth and those on chart remain the same.
Equator and parallels of latitude appear as straight lines.
Straight line joining two points is not the shortest distance.
Types:
Navigational, PEXA, GC Plotting.
All Admiralty charts less than 1:50 000 i.e. 1”= 1 ½ miles
Grunt Productions 2007
Parallels and meridians are straight lines and at right angles.
Angles and distances can be accurately measured.
Land is correct shape in any locality.
Disadvantages
Latitude scale not constant over whole chart.
Straight line between two points is not necessarily shortest distance.
Grunt Productions 2007
Rhumb lines appear curved
Straight line between two places is the shortest distance.
Used for GC and Polar charts
Grunt Productions 2007
Chart is orthomorphic, but meridians and parallels are slightly curved.
Central Meridian
Advantages
Can be used to give orthomorphic representation of any part of the earth’s surface by appropriate selection of the central meridian and suitable scale.
Disadvantages
Unacceptable distortion away from central meridian at small scales.
Used for all large scale Admiralty charts and OS maps of GB.
Grunt Productions 2007
A modern survey.
Continuous depth contours.
d 1956-79 1:12 500 - 1:25 000
e 1958-71 1:3500
Other Surveys
11.unknown
Grunt Productions 2007
DANGERS BETWEEN LINES
Appearance of corresponding
M97/1310-1A-18
14.unknown
Date of new Edition - at right of 12.
Date of small Correction - bottom left.
Date of printing - with label.
Depth in Metres - top left, bottom right.
Tide Levels referred to Chart Datum.
Grunt Productions 2007
SATELLITE DERIVED POSITIONS
Spheroid O2, provides best fit for North America
O1
O2
N
N
North
America
Europe
South
America
Africa
GEOID
Charts arranged in numerical order.
Folio Label - Number, date of issue, correction state.
Folio List - Number and titles of charts.
Folio Scheme
Prefixed by: F, R, W/WL or Q.
Grunt Productions 2007
CORRECTION OF CHARTS
I Index
II Corrections for the week - including (T) and (P) corrections. Publication of new charts, new editions
III Navigational warnings
V Corrections to Admiralty List of Lights and Fog Signals
VI Corrections to Admiralty List of Radio Signals
Grunt Productions 2007
Permanent
1983 // NC 15-4-83 3016
Chart
No.
Consec
No.
Covers specific coastal area e.g., WZ’s
Local Radio Warnings.
VHF b’cast by local port, pilotage or Coastguard authority.
Inshore waters.
a. General information
c. Navigational publications
e. Outfit of charts and publications - supply and upkeep
f. Air charts and maps
g. Disposal of charts
i. Lists of navigational publications
Grunt Productions 2007
a. List of navigational charts arranged in geographical sequence
b. Numerical index of charts
c. List of Sailing Directions and other publications of use to mariners
d. List of miscellaneous charts and diagrams
2. CHART CORRECTION LOG AND FOLIO INDEX (NP 133B)
a. Record of new charts
b. Folio Correction Sheets
Grunt Productions 2007
Supplied automatically with chart outfits supplements issued every two years
a. Information relating to Admiralty charts and publications, general
navigation and meteorology. Views included in main text
b. Index chart for area covered by volume
c. Chapter 1:
a) Navigation - Regulations
2) Territorial waters
Grunt Productions 2007
Volume 1: Coastal Radio Stations
Volume 2: Radio Navigation Aids (eg Loran C)
Volume 3: Radio Weather Services & Nav Warnings
Volume 4: Meteorological Stations
5. ADMIRALTY LIST OF LIGHTS AND FOG SIGNALS (NP 74 TO 84)
a. Index chart showing limits of volumes (A to L)
b. Introductory remarks on types of lights, fog signals etc
c. Range tables
Grunt Productions 2007
Volume 5: GMDSS
Volume 7: Vessel Traffic Services (VTS) & Reporting Systems
Volume 8: Satellite Navigation Systems (eg GPS / GLONASS)
Grunt Productions 2007
8. ADMIRALTY TIDE TABLES AND TIDAL STREAM TABLES (3 Volumes)
1) Worldwide coverage
3) Chart Datum's relative to ordnance datum's
4) Notes in use
7. ADMIRALTY DISTANCE TABLES (3 Volumes) (NP 350)
1) Shortest navigable distances for ships drawing up to 10m
2) Link points between sections and volumes shown in red on chartlets
N.B. Advisable to add 5% when passage planning
Grunt Productions 2007
1) Pocket editions for UK waters
2) Interpolation table for stream between neaps and springs
9. TIDAL PREDICTION BY THE SIMPLIFIED HARMONIC METHOD (NP 159A)
1) Computer program available on both 720k 3.5 inch and 360k 5.25 inch floppy disk
2) Intended as a useful supplement to all three volumes of ATT and not as a replacement
3) Programme can be used to calculate predictions for any port for which harmonic constants are known and for any date - past, present or future
4) “Tidecalc” “Total Tide” UKHO Products / Agency !
Grunt Productions 2007
1) Complements Sailing Directions
4) Observing and reporting hazards
5) Basic Meteorology
1) Recommended routes
3) Details of wind, weather, currents and ice hazards
4) Diagrams showing
Grunt Productions 2007
NAVIGATION DATA BOOK
2. Page for record of inspections
3. Page for recording despatch and receipt of Ship’s Logs
SECTIONS
F Turning Trials
M Compasses
Q Navigation Lights
R Radio Aids
T Ship’s Narrative