CERTIFICATES OF COMPETENCY IN THE MERCHANT NAVY DECK OFFICER EXAMINATIONS ADMINISTERED BY THE SCOTTISH QUALIFICATIONS AUTHORITY ON BEHALF OF THE MARITIME AND COASTGUARD AGENCY STCW 95 OFFICER IN CHARGE OF NAVIGATIONAL WATCH REG. II/1 (UNLIMITED) 034-83 NAVIGATION WEDNESDAY, XX July 2009 0915 1145 hrs Examination paper inserts: Datasheet Q3 Deviation Curve Luminous Range Diagram / Geographical Range Table Notes for the guidance of candidates: 1. Candidates should note that 100 marks are allocated to this paper. To pass candidates must achieve 60% of the total marks available. In addition, candidates must achieve a minimum of 70% from Section A. 2. Non-programmable calculators may be used. 3. All formulae used must be stated and the method of working and all intermediate steps must be made clear in the answer. Materials to be supplied by examination centres: Candidate s examination workbook Nautical Almanac Navigation Formulae Datasheet UK and Ireland Tide Tables Nautical Tables Pacific and Atlantic Oceans Tide Tables Chart 5048 [OVER
NAVIGATION Attempt ALL questions Marks for each question are shown in brackets The positions given after the names of prominent points are approximate to 1' and are to be used for identification purposes only. All times are Standard Time unless otherwise stated. Section A 1. A ship bound for Waterford Harbour (52 o 11 N 6 o 57 W) is steering 021 o G at speed 12.5 knots. At 1600hrs the G.P.S. position is given as 51 o 22.6N 7 o 25.5W. At 1700hrs the G.P.S. position is given as 51 o 35.4N 7 o 15.6W. Gyro error 2 o low. (a) Find EACH of the following: (i) (ii) the course and speed that the ship is making good at 1700hrs; the set and rate of the tidal stream at 1700hrs. (4) (6) (b) An inspection of the tidal stream atlas indicates that the tidal stream will remain constant until 2000hrs. The Master requires that the ship be at the position 3.0 mile to the south-west of Hook Head (52 o 07 N 6 o 56 W) at 1930hrs. Find the gyro course and the ship s speed required. (c) The Master has left orders to be called 5.0 miles prior to the required 1930hrs position. Find the estimated time that the Master will be called. (10) (5) [OVER
2. (a) The Admiralty Tide Tables state that chart datum is at or near the level of Lowest Astronomical Tide. Explain the term Lowest Astronomical Tide. (b) State SIX possible reasons for differences between the published tidal heights / times and the actual tidal heights / times experienced. (3) (c) With reference to the tidal predictions for Plymouth (Devonport) (Index No. 14, UK and Ireland Tide Tables), explain EACH of the following: (i) (ii) the black symbol beneath the date and day 29 th March, Thursday; the significance of this symbol relative to the tidal characteristics. (d) Explain EACH of the following terms, stating the units used: (i) (ii) (iii) tidal set; tidal drift; tidal rate. 2
Section B 3. With reference to the ship on passage to Waterford Harbour, Q1, and using Chart 5048. (a) Outline any relevant information regarding the accuracy of the G.P.S. positions obtained at 1600hrs and 1700hrs. (b) Ship s height of eye 12.2m. Prevailing visibility 3.0 miles. State the predicted distance Hook Head light would first be seen. (c) Hook Head light shows the symbol Racon (k). Draw the echo that would appear on the ship s radar in relation to this charted symbol. (d) Outline the suitability of making a landfall off Hook Head, in view of the restricted visibility. (e) Outline any help that the echo sounder could give in respect of making this landfall. (f) With reference to the symbol in position 52 o 07.2N 6 o 59.0W, explain the possible effects on the ship whilst entering Waterford harbour. (3) (5) (g) In the event of it not being possible to proceed to the berth due to the restricted visibility the Master intends to anchor between Keeragh Islands (52 o 12 N 6 o 44 W) and Great Saltee Island (52 o 07 N 6 o 37 W). State EACH of the following: (i) the approximate height of the islands above chart datum; (ii) the nature of the seabed to the east of Keeragh Islands. (3) 2
4. At 1620hrs UT 8 th March, a Pan Pan message is received from a ship requiring medical attention for an injured seaman. Your ship, in position 22 o 20 N 25 o 30 W, makes contact with the ship and agrees to rendezvous in position 18 o 00 N 28 o 00 W. (a) Calculate, by Plane Sailing, the required course and distance to the rendezvous position. (10) (b) So as to ensure the safety of personnel whilst transferring between ships it is decided that the rendezvous will be at the time of sunrise next morning. Find own ship s speed required. (7) 5. (a) At approximately 1430hrs, ship s time, 23 rd September, a bearing of the sun, 291 o C, was obtained. The satellite derived position at the time of the observations was 13 o 48 S 159 o 35 E. Chronometer showed 3h 40m 15s. Chronometer error 13 seconds slow. Variation 1 o W. Calculate the deviation of the compass for the ship s head. (17) (b) At the time of the observations the ship s head by compass showed 083 o C. Using Datasheet Q5 Deviation Curve, state the deviation that the OOW should have expected and any subsequent action, in light of the celestial observation, that should be taken by the OOW. (5) 2
2