We have consolidated all the videos for Grade 12 on this page for ease of access. They also appear on the pages associated with each topic and are designed to give you a graphical and ‘classroom like’ overview of each topic, providing context and meaning to the course syllabus that follows on that particular page.
Annexure 1: Deviation card Annexure 2: Altitude correction tables 10°- 90° – sun, stars and planets Annexure 3: Conversion of arc to time Annexure 4: 1994 Nov. 30, Dec. 1, 2 (Wed., Thurs., Fri.) Annexure 5: Increments and corrections 30′, 31′ Annexure 6: Increments and corrections 32′, 33′ Annexure 7: Walvis Bay, August 2020 Annexure…
Before the invention of the steam engine, ships were powered by the wind. This meant that they were dependent on the wind and on ocean currents. Voyages took a long time and were not direct from one port to another as the ship’s route followed the wind belts. An example of this is the route…
To assist Grade 12 students in preparing for the Paper 1 and Paper 2 final exams, we asked well-known maritime educator, Professor Dr Captain Ed Snyders, to provide a step-by-step guide using the IEB 2018 Nautical Science final exam papers. Each of the two papers have been divided into short videos (one per question) to…
Each GMDSS ship station is allocated its own unique nine digit MMSI number which is included automatically in each DSC call made by the station. Included in the MMSI number are the maritime identification digits (MID) which identify the country licencing/controlling the station. Three types of MMSI numbers are in common use to identify individual…
It is compulsory for SOLAS vessels to have GMDSS equipment. This includes all passenger vessels and cargo vessels of 300 gross tons and above on international voyages. There are also a very large number of vessels that don’t undertake international voyages and do not have to comply with GMDSS, ie fishing vessels, warships, yachts, etc.…
As far as the availability of equipment is concerned, there are three options: At sea maintenance. Shore based maintenance. Duplication of equipment. Ships operating in areas A1 and A2 must nominate one option. Ships operating in areas A3 and A4 must nominate two options. Details of the options applicable are contained in the radio safety…
Deck officers should have the following knowledge/ability: A detailed knowledge of the operation of all GMDSS sub-systems and equipment. The ability to send and receive messages correctly by radio telephone and NBDP. A detailed knowledge of the regulations applying to radio communications. A knowledge of the documents relating to the charges for radio communications. A…
The minimum operator requirements for vessels is as follows: ships operating within range of a VHF coast station – ROC (Restricted operator certificate). ships operating beyond the range of VHF coastal stations – GOC (General operator certificate). The international convention on STCW require that all deck officers shall hold an appropriate qualification to operate VHF…
The GMDSS is designed to perform 9 functions: Transmission of ship to shore distress alerts by two separate and independent means. The details for this function are contained on the individual ship’s radio safety certificate. For example, a ship in area A1 would use VHF DVS equipment as the primary means and the EPIRB as…
