Piloting Session Seven 1 Outline Homework Student Guide Ch 7 Manual Piloting Weekend Navigator Part IV Double Checking Your Navigation Ch 10 Double Checking Using Instruments Ch 11 Eye of the Mariner 2 3 4 5 6 7 8 9 Question 6 17 courses crossing boat to port relative bearing increasing Time 2 Time 2 relative bearing 2700 Time 1 Time 1 relative bearing 2700 10 Question 6 18 courses crossing boat to starboard relative bearing decreasing Time 2 relative bearing 900 Time 1 relative bearing 900 11 Question 6 19 courses crossing boat to port relative bearing stays the same Right of way question Time 2 Time 2 relative bearing 2700 Time 1 Time 1 relative bearing 2700 12 Question 6 20 courses crossing boat to starboard relative bearing stays constan Right of way question Note the answer says turn to starboard wrong Or slow down right Time 2 relative bearing 900 Time 1 relative bearing 900 13 Student Guide 7 Manual Piloting Objectives Finding your position when the GPS dies Using Dead Reckoning Finding position using bearings Navigating manually using dead reckoning 14 Student Guide 7 Manual Piloting Outline If the GPs fails Establish position Position by dead reckoning Navigate by dead reckoning Bearings Estimating Time of Arrival ETA 15 If the GPS Fails 1 You should be following a pre planned route on a chart print out hard copy noting position at least on the hour 2 You should be maintaining a DR plot on a paper chart if not doing the equivalent by doing 1 16 Dead Reckoning Tools Paper Chart Note time of departure from a known position Close by an aid to navigation ATON fix Plot course Direction true or magnetic speed Plot dead reckoning position using 60 D S T Every hour If course changes If speed changes 17 Dead Reckoning Tools Cont In coastal piloting establish a fix with two bearings off of landmarks Restart DR plot from fix Check DR track with estimated position from a single bearing line of position or a depth contour line of position Magnetic course is determined from boat s compass 18 Dead Reckoning Cont T V M D C variation from compass rose magnetic course deviation chart compass heading Recall west is best add going down reverse going up 19 Estimated Time of Arrival ETA Use 60 D S T When will I approach the shipping lanes Time for extra aware lookout When will I approach an aid to navigation Fix and check on DR plot When will I approach anchorage 20 Exercises 21 Weekend Navigator Part IV Double Checking Your Navigation Three Pillars of Coastal Navigation One Pre Plan Two Navigation On the Water Three Double Checking Do not rely on one instrument or one method Ch 10 Double Checking Using Instruments During pre planning enter waypoints in GPS then on the water your GPS will give you the heading to that waypoint which you can check against a visual compass bearing 22 23 Weekend Navigator Quick Observations Keep in touch with your environment Bearings Bow bearings Beam bearings 24 Bow Bearing 25 Beam Bearings Bearing Beam Bearing 900 Relative Boat Heading Bearing to buoy 1600 700 900 Bearing Beam Bearing 2700 Relative Boat Heading Bearing to tower 3400 700 2700 Note relative bearings have to be Converted as above to magnetic Or true to plot on the chart 26 Compass Bow Bearings Absolute magnetic bearing if no deviation does not have to be converted like a relative bearing such as beam bearings which are relative to the bow 27 Quick Comparisons with GPS Compare visual bearings to aids to navigation ATONS or landmarks with headings of preentered ATONS on GPS Note for beam bearings the waypoint symbol will be abeam of the boat symbol on the GPS map screen 28 Comparing Your Bearings with a Chart Even if visual bearings agree with GPS plot bearings on your DR chart to check your DR plot Use compass rose 29 More Accurate Bearings Use a hand bearing compass or binocularcompass 30 Ways to Access a Waypoint Bearing Map Screen Waypoint 31 Map Screens 2003 R J Sweet GPS for Mariners Reprinted with permission 32 Waypoint Use Nav key select go to point hit enter With waypoints selected hit enter Use rocker key to select desired waypoint hit enter Use rocker key to select map hit enter Data field on map shows bearing from current position to waypoint 33 WN Ch11 The Eye of the Mariner On the Water Practical Skills Headings and helmmanship steer towards an object or point on the horizon 34 Quick Angles Points of the Compass dividing by two Using the hands dividing by three North By North East 35 Quick Horizontal Angles Its all in the hands 36 Ranges 37 Using a Range to Measure Deviation 38 Avoiding Danger 40 To left Keep to the left 39 Bearings A Two Bearing Fix 40 Relative Bearings Boat Heading Relative Starboard Beam Bearing Bearing 040 M 090 130 M 41 Collision Bearings 42 Collision Bearing Pass Ahead Pass Behind 43 Rules of Road Stand on Vessel maintain course and speed i e do not confuse situation unless you have to avoid collision Pecking order less maneuverable vessels have priority Big ships can not stop or turn quickly Fishing boats trawlers Two power boats meeting head on Neither are stand on both must give way 44 Rules of the Road Pecking Order 45 Rules of the Road Head On Pass Head On Like cars Move to Starboard Signal 1 Toot Answer 1 Toot OverTaking Pass to Starboard Signal 1 Toot Pass to por Signal 2 toots 46 Rules of the Road Right Angle Cross Danger Zone 22 50 You are in His danger Zone he Gives way If you can See his green light Stand on You are Give Way Vessel Turn to Starboard Unless to avoid collision If they can see your Green light give way 47 Running Lights Legacy of Compass Points 45 2 22 5 90 22 5 112 5 112 5 X 2 225 360 225 135 22 50 48 Rules of the Road Sailboats Wind 49
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