SEAMANSHIP CH. 4 MARLINSPIKE SEAMANSHIP - ppt video online download

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SEAMANSHIP CH. 4 MARLINSPIKE SEAMANSHIP
AUXSEA STUDENT STUDY GUIDE.
LINE: Name given to all ropes when put to use aboard a vessel. Two or three strands TWISTED clockwise to form one single strand.
Made from plant fibers. Most popular. ADVANTAGES. Readily available. Inexpensive. Very durable.
Manila has been virtually replaced by synthetic lines especially for running rigging.
½ Strength of Manila. Susceptible to rot. Stretches, especially when wet.
A FID is the instrument or tool used to work on natural and synthetic lines and is usually made of WOOD, PLASTIC or ALUMINUM, SO AS NOT TO DAMAGE THE LINE while working it. MARLINSPIKE: In appearance, it may look almost like a FID but is made of STEEL for endurance.
Almost impervious to salt, air, water and anything else that could destroy natural line. Tougher and stronger for their size than almost any other line material. Last a long time. Do a better job than any other kind of line.
It tends to UNLAY when cut. Must be whipped or stopped immediately. Open flame or Heating iron good for this.
NYLON. DACRON. POLYPROPYLENE. POLYETHYLENE.
CAN ABSORB 7 TIMES SHOCK LOAD OF MANILA. USED EXTENSIVELY FOR TOWING AND MOORING. HIGH RESISTANCE TO ROT. HIGH ABRASIVE RESISTANCE.
Twice as strong as manila. Can use nylon of smaller diameter in replacing manila lines. Cheaper in the long run. Extremely flexible. No breaking in period.
When it reaches the end of it’s elongation, it will SNAP, like a rubber band, becoming extremely dangerous to anybody or thing in it’s path.
Fairly light in weight. Mostly has replaced cotton lines on most vessels.
Low abrasion resistance. Not nearly as supple as other synthetics. Knots need to be secured.
**Stronger when it is wet**
Many strands of wire are wound over an inner core of either wire or fabric such as cotton or a synthetic fabric. The core provides a source of lubrication(when oiled)(or graphite) to ease the friction of the wires and also provides some elasticity or give.
WIRE ROPE. 5 GRADES RELATIVE TO STRENGTH. IMPROVED PLOW STEEL. PLOW STEEL. MILD PLOW STEEL. TRACTION STEEL. IRON.
Extremely stiff. Must use a MARLINSPIKE to work with it. Difficult to work with.
DO NOT OVERLOAD: Generally, safe working strength is 1/5 the BREAKING strength. PROTECT AGAINST ABRASION: Always use chaffing gear. AVOID SUDDEN STRAINS ON THE LINE: KEEP YOUR LINES CLEAN: Sand, dirt and grit will grind away the material in a line. Wash them as needed.
a. FAKING: YES. When appropriate. b. COILING: YES. When appropriate. c. FLEMISHING: YES. When appropriate. d. CHORDING:NO. Bunched up and thrown into a rope locker! Even when you do it wrong, there is a proper name for it! DO NOT CHORD your lines! .
8. Keep all chemicals away. 9. Avoid excess wear. 10. Avoid kinks. 11. Don’t run lines over sharp edges.
Underhand Loop. Standing. Part. Bitter End.
DOCKING: Your EYE SPLICE up through the other eye splices – over the top and let settle around the piling. UNDOCKING: lift your eye splice up over the piling then pull through other eye splices from the bottom. YOU’RE ON YOUR WAY.
The square knot will JAM if heavily loaded, making it almost impossible to break it down without cutting it out. It may also be forced into two half hitches, under great strain.
Won’t slip under a load. Easy to tie and untie. One of the MOST USEFUL knots we have today.
Round turn with two half hitches commonly used as a long term fastening to secure a line to a piling.
TWO HALF HITCHES. USED TO TIE A LINE TO A RING, PILE, POST OR GROMMET. EASY TO UNTIE. UNDER TENSION. MORE PERMANENT THAN A CLOVE HITCH.
When under a strain, it will not slip. When under a hard strain, it will set up tight and may be difficult to break down. On the other hand, if left slack, it may work itself loose.
Fast and easy knot to tie and break down. If you use half hitches with this knot, tie them FIRST , then proceed with the timber hitch.
Can be be bent to a spar or other similar object. Used to form a bridle for towing.
DOUBLE BECKET: Simply an extra turn back under and through.
SHEET OR BECKET BEND animation
EYE SPLICE:To make a PERMANENT EYE at the end. LONG SPLICE: Does NOT increase diameter of the line. Good for use with blocks, sheeves. SHORT SPLICE: May increase lin Preferred method of joining two lines together e diameter and is not used to run through a block, etc.
MOORING DEVICES BITTS BOLLARDS CLEATS SAMPSON POSTS
BITTS Used to moor large vessels. Normally found on commercial piers.
Used to secure lines of all sizes and uses.
b. when dipping your line is required. c. securing hemp lines only. d. a temporary fastening is desired.
2. Which knot is most useful to temporarily join the ends of different diameter lines The _________. a. Fisherman’s bend. b. Square or Reef knot. c. Sheet or Becket Bend. d. Sheepshank.
a. knot. b. splice. c. marlinspike. d. turnbuckle.
b. Dacron. c. Cotton. d. Nylon.
REVIEW QUESTIONS 4. Which of the following types of line has the highest elasticity d. Nylon
a. flax. b. sisal. c. cotton. d. manila hemp.
in the end of a line. b. difficult to untie and tends to slip. c. most useful for reefing sails. d. never used to tie sheets to the clew of the jib sail.
a. especially useful for forming a loop.
REVIEW QUESTIONS 7. Cotton rope has about _____as much strength as compared to manila b. 1/2
b. will float. c. have a higher abrasion resistance than. Dacron or Nylon. d. are stronger when wet than when dry.
REVIEW QUESTIONS 8. Rope made of the synthetics Polypropylene and Polyethylene _____ b. will float
a. flemished. b. faked. c. coiled or wrapped. d. braided.
a. in the open sun. b. in dark, damp storage. c. when tightly spliced. d. under a heavy towing load.