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QM-10 QuartermasterLeadership Instructors: George Crowl
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Course Outline a. Teach the Ordinary and Able piloting requirements to a crew. b. Know the methods of fixing a boat's position in limited visibility.
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QM-10a a. Teach the Ordinary and Able piloting requirements to a crew.
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Techniques Generally, follow the order of the requirements However, teach 24-hour time before Zulu time Have nav kits (plotter, dividers, 0.5 mm pencil, eraser, calculator) Plotters are preferred over parallel rules DR calculators are OK if available, are faster USPS Bowditch Bay charts are inexpensive
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Techniques (2) Additional instructors ratio 1:6 or 8
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Equipment Needed Lesson plans and/or PPTs for ORD-10, ABL-10 (as desired) White board Pre-planned routes with fixes for exercises
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Teaching EDGE Lacks two things – objectives, motivation You have to supply both Objectives – simply put – the requirements Motivation – why should a Sea Scout want to pass an advancement requirement? YOU have to provide the motivation – how it will be used, it may be fun to do, whatever will persuade the Scout to do it Give a pre-test? You may be able to sign them off as complete with part or all of it
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Teaching EDGE (2) Four main steps Explain Demonstrate Guide Enable
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Explain “How do we measure a course between two points?” Put dividers on the two points Lay plotter snug to dividers Slide plotter “bulls eye” to longitude line Read angle on plotter Select correct one of two shown l
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Demonstrate Instructor shows how Pick two points 4-6” apart Put dividers on points Lay plotter next to points Slide along until bulls eye lines up on longitude (vertical) line Look at angle circle, note direction numbers are increasing Select lower 10°
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Demonstrate (2) Interpret the single digit between 10° lines Lay down your dividers, gently Draw the line between the two points along the plotter edge Write the true course on your log and chart Insure that if you are going east, the number is between 0° and 180°
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Guide Have Scouts practice manipulating dividers One hand to hold dividers, one to move plotter Guide plotter bulls-eye over longitude line Interpret to 1° Select correct hemisphere for value Learn how to use latitude lines for north-south courses
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Enable Do a “ground mission” using charts and giving them all the inputs to put on the chart and log Do an actual sail on a larger (26'+) boat with GPS and hand bearing compass Take fixes, alter heading into turning points and destination
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When do You Pass the Scout? Policies vary between ships Author's opinion: if the Scout can repeat the correct solutions to the problems posed, and reacts correctly on the water, s/he has met the requirements for piloting. If it is not used, it will be forgotten. If you have no large boats, you may need to use ground missions. Other skills, perhaps knot tying, should be demonstrated several times by the Scout before passing.
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QM-10b b. Know the methods of fixing a boat's position in limited visibility.
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GPS First choice Not normally affected by visibility Gives very precise position (less than 10 meters) “Highway” function will keep you on desired course Will calculate reasonable ETAs
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Radar Radar's primary use in limited visibility is collision avoidance Radar can also be used for fixing Range & bearing from known point 3-bearing fix 3-range fix Radar reflectors
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Radio Direction Finder Device gives bearing of radio station Can use commercial radio stations Charts identify radio towers of some stations Plot bearing(s) Mostly used at sea
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Sound Close to shore, with high hills, sound will echo Sound travels a mile in five seconds (1125 ft/sec on a standard day) Time the return sound, divide seconds by 2, is distance to reflecting surface (which may be behind the shore)
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Depth Meters Depth finders / fish finders will show bottom depth Charts will show water depth (MLLW) In many places a depth contour is like an LOP
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Actions to Take in Fog, etc. SLOW DOWN Keep good DR positions Monitor GPS, radar, etc., constantly Increase watch, ahead and astern Listen for other traffic, horns, sea noise, etc. Take all available fixes Maintain planned course
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Questions?
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