iti 25 January 2021
  • 1.Construction of scales and diagonal scales
  • 2.Basic Navigational Chart Work Practice Introduction of a navigational chart. Various type of navigational chart. Parallel Ruler and instruments used. Measurement of distance, sea miles, International nautical mile, geographical mile.
  • 3.Great circle, parallels of latitude and Longitudes. Important features of Mercator chart. Simple plotting of position and measurement of distance. 
    • Variation, Deviation, Conversion of compass course to true course.
  • 4.Conversion of true course to compass course. Calculation involving
    • deviation, variation, and compass error. A few terms associated with chart work, symbols and Abbreviations
  • 5.True bearing, compass bearing, abeam bearing. Current, wind and its effects. Allowing current and leeway.
  • 6.To counter act current and wind. Find actual current experienced.
  • 7.Method of fixing the ship position by bearing and depth, bearing and distance by vertical sextant angle, horizontal angle or Radar Given: course steered engines speed direction and rate of current wind and leeway to find course and speed made good. Give: Initial position / final position to
    • find set and rate of drift Transfer position line and simple running fix.
  • 8.ADVANCED NAVIGATIONAL CHART WORK PRACTICE Transfer of position
    • line and running fix with current. Running fix with current and leeway.
  • 9.Transfer to position line while makes more than one course to given running fix. To find course to steer to counteract the current and leeway.
  • 10.To find course to steer and speed to steer in order to maintain the required ETA in prevailing current. Three bearing method to find course made good
  • 11.To find CMG direction by three bearing of same object from different position.[only set is given rate is not known]
  • 12.To find CMG direction by three bearing of same object from different position[both set and rate is given]
  • 13.Dipping and rising bearing of lights[dipping range or rising range]
  • 14.To find true set and drift [actual set and rate of current experienced]
  • 15.Tide problems
  • 16.To arrive with a given point right ahead at extreme range.
  • 17.Nautical publications.