GENERAL CONCEPTS, NAVIGATIONAL AIDS AND INSTRUMENTS, VHF RADIO COMMUNICATIONS

Theoretical  Navigation Grade B  Examination - allotted time  90 minutes
S u b j e c tFam.Prof.
 
The Geographical Grid: Great and small circles, geographical latitude and longitude, the Greenwich meridian , the equator, the Mercator projection and the Mercator chart. X  
The Compass, main features: The magnetic compass, the electronic-magnetic Flux-Gate compass, the Gyro compass. Determining the various types’ errors, compiling a deviation table. Taking bearings with the magnetic compass, the hand-held compass and the electronic compass.   X
Time: Greenwich Mean Time (GMT,  UTC), zone time, calculating  time zones.   X
The sun’s annual motion, locating the main constellations in the sky, locating Polaris by means of Orion, the Great Bear (Ursa Major), the Little Bear (Ursa Minor)and Cassiopeia   X
The moon’s monthly motion. X  
GPS:  Basic operating principles, the expected precision of the GPS, basic starting procedure, the data units. The meaning of DGPS and other abbreviations, defining and installing Datum, additional uses.   X
RADAR: Basic operating principles, precision, abilities and limitations, detectable and undetectable objects, radar interference phenomena and the means to overcome them, navigating by radar, determining risk of collision and analyzing radar motion data, relative and true picture, “North Up”, true radar bearings when north is not up, using the various control knobs. The factors effecting detection range, bearing and range precision. The meaning of the following terms: Stand-by, Gain, Brilliance, Rain clutter, Sea clutter VRM, Range rings, Cursor, Tuning, Dimmer, Automatic alarm. X  
Echosounder: Basic operating principles, advantages and disadvantages, what depth does it measure, alternative sounding methods.   X
Relative Motion: The principles and the comprehension of movements of vessels, using Radar. X  
NAVTEX: Basic operating principles, pre-voyage installing requirements, estimated receiving range, receiving areas, the various types and forms of messages, the weather sector names in the Mediterranean Sea, transmission intervals, distress priorities, languages in use.   X
Auto-pilot Electrical, hydraulic  and wind-vane types, operating principles, advantages and disadvantages.   X
Boat Logs: Pitometer, Electric Log, GPS, Doppler Log. Operating principles, advantages and disadvantages.   X
E.P.I.R.B. :  It’s application, the working frequencies, operation principle. Necessary data installation. X  
S.A.R.T. : Operation mode, the various displays: What receiving equipment is required and at which ranges.   X
Navigation manuals, Pilot Book, List of Lights, Book of Radio Signals: What can be found in each of them. X  
The Marine VHF: Main characteristics, the control-knobs. What are: The DSC unit, the “Dual Watch” method, the output capabilities of a non-portable marine unit? What factors determine the communication-ranges of the  VHF?  The effect of special communication conditions (Ducting), specific channels for special purposes: “Intership”, port services. X  
The various urgency levels: MAYDAY, PANPAN, SECURITE.   X
The MEDICO procedure. X X
Contacting HAIFA RADIO and the Navy on the VHF. What are the requirements along the Israeli shores according to regulations.   X
The IMOT procedure: The obligatory report when approaching Israel’s shore.   X
The procedure of requesting “Collect Calls” from a coastal station X  
Avoiding interference with transmissions, defining channel  16  and channel 70.   X