HND Nautical Science

CHARTWORK

Exercise 1a   Positions, Bearings, Distances and Symbols

Chart 5047

1.      Name the conspicuous features in the following positions:

a)      51°  01.3¢N              4°  31.5¢W                           

b)     51°  13.3¢N              3°  28.5¢W                           

c)      51°  26.0¢N              3°  46.0¢W                           

d)     51°  30.4¢N              3°  40.2¢W                           

e)      51°  27.5¢N              3°  24.1¢W                           

f)       51°  41.1¢N              3°  50.9¢W                           

g)     51°  33.9¢N              4°  20.0¢W                           

h)     51°  28.9¢N              3°  10.4¢W                           

i)       51°  20.4¢N              3°  06.4¢W                           

j)       51°  31.5¢N              2°  46.8¢W

2.      Find the latitude and longitude of the following conspicuous features:

a)      Lundy Island South lighthouse             

b)     Scarweather lightvessel

c)      Swansea pilot station                           

d)     Bideford Fairway buoy                           

e)      St. Gowans lightvessel                           

f)       Caldey Island lighthouse                           

g)     Swansea airport aero RC                           

h)     Flat Holm lighthouse                                         

i)       Minehead light                            

j)       Horseshoe Rocks buoy                           

CHARTWORK

Exercise 1b:              Positions, Bearings, Courses, Distances and Transits.

Chart 5047

1. A ship observes the chimney on Breaksea Point to be in transit with St. Hilary radio masts (51° 28¢N 3° 24¢W).  Find the true bearing of the transit and also the latitude and longitude of the ship, given that the ship is 4.0 miles from Breaksea Point.

2. The water tower (51° 31¢N 3° 40¢W) is seen in transit with the Middle Nash buoy, while at the same time Nash Point light is seen to be changing from white to red.  Find the true transit bearing and the ship’s position.

3. A sounding of 20 metres was obtained while Nash Point lighthouse bore 076°T. Give the latitude and longitude of the ship.

Chart 5072

4. Find the course and distance from Kullagrund light bearing 000°T x 5.0¢ to Hammerodde light bearing 180°T x 5.0¢.

5. Find the course and distance from 55° 40.0¢N, 14° 32.5¢E to Gudhjem pilot station.

6. Position 1:              Hano Island light bearing 005°T, southern tip of Hano Island range 6.3¢.

Position 2:              Utklippan light bearing 150°T range 2.5¢.

Find:              a)   the latitude and longitude of position 1;

b)     the latitude and longitude of position 2;

c)      the course and distance from position 1 to position 2.

7. Position 1:              Olands Sodra Udde bearing 015°T, Olands Sodra Grund bearing 070°T.

Position 2: Christiansø light bearing 282°T, Svaneke light bearing 219°T.

Find:              a)   the latitude and longitude of position 1;

b)   the latitude and longitude of position 2;

c)      the course and distance from position 1 to position 2.

CHARTWORK

Exercise 1c   Geographical, Nominal & Luminous Range, Tidal Streams & Depths

Chart 5048

1.      Define;              a)   Nominal Range,      b)   Luminous Range,      c)   Geographical Range.

2.      With reference to Hook Head light, what is the              a)   Nominal Range,

b)      Height above MHWS.

3.      With reference to Youghal light, what is the              a)   Nominal Range of the red light,

b)      The limiting bearings of the red light.

4.      With reference to Ballycotton Island light, what is the             

a)      Nominal Range,

b)     Luminous Range if the prevailing visibility is 10 nautical miles.

5.      What is the Geographical Range of Ballynacourty Point light for an observer whose height of eye is 12 metres.

6.      What is the Luminous Range of Old Head Of Kinsale light if the prevailing visibility is;

a)      20 nautical miles,

b)     2        “         “

c)      7        “         “

7.      At what distance would Roche Point light be first sighted if the prevailing visibility is 5 miles and the height of eye is 4 metres.

8.      At what distance would Coningbeg lightvessel light be first sighted if the prevailing visibility is 5 miles and the height of eye is 4 metres.

9.      What is the height of Youghal light above;               a)   MLWS

b)   MHWN.

10.  What is the height of Tuskar Rock light above MHWN.

11.  State the meaning of the symbol in position Latitude 51° 43.0¢N Longitude 8° 16.5¢W

12.  If High Water at Cobh is at 1500 hrs what is the neap tidal stream in Youghal Bay at;

a)      1000 hrs,

b)     1700 hrs.

13.  If High Water at Cobh is at 1500 hrs what is the spring tidal streams will a ship experience to the East of Tuskar Rock between;              a)   1130 to 1230 hrs,

                                                                                    b)   1800 to 2000 hrs.

14.  If High Water, spring tides, at Cobh is at 1930 hrs what will be the total distance that a vessel drifts between 1430 and 1730 hrs in the proximity of Coningbeg lightvessel.

15. If High Water, neap tides, at Cobh is at 1600 hrs state the direction and distance that a vessel will drift between 1800 and 2130 hrs in the proximity of tidal diamond E.

DGR/AWS/09/06               Chartwork and Tides              2 of 4