Basic/47 crewman Flashcards
how many bilge pumps, water witches, heights, functions and frames to overboard?
7 bilge pumps 13 water witches 5"-sounds alarm 10"-starts auto suction Frames: transom,3,9,11
what are the 8 knots?
square knot-used to tie 2 lines of equal size/length together.
bowline-used to put a temporary eye at the end of a line.
clove hitch-used to secure a heaving line to a tow line, rung or spar.
slip clove hitch-a clove hitch with a quick release.
rolling hitch-used to attach one line to another, where the second line is
under a strain and cant be bent.
timber hitch-used to secure a line to a log,spar,plank,or other rough surfaced object.
double becket bend-used to join lines of unequal size.
half hitch-used to temporarily secure a line to an object such as a ring or eye.
anchor specs: type weight chain length/size anchor reel line type configuration parts of an anchor (4) and define
}Danforth Fortress Fx-37
}19 lbs with 9’ stainless steel 3/8” chain
}attached to 300’of 2 1/4” double braided nylon line.
}from anchor to line: anchor-shackle-9’ of chain-shackle-swivel-shackle-thimble-300’ of line.
}crown-lifts the rear of the flukes and forces into the ground
stock-prevents anchor from rolling
flukes-digs in the bottom providing holding power
shank-aids in setting and weighing anchor.
anchoring terms short stay rode scope fouled/clear
other types of anchors.
short stay- anchor still in the ground line is completely vertical all slack has been taken out.
rode-the length of line ( and chain) from the bow to the anchor.
scope-the overall length of line to be let out based off water depth and weather conditions in the form of ratios.
>normal/calm-5:1
>heavy weather-7:1
>surf-10:1
fouled/clear-anchor is caught/clear of debris.
other models of anchors
}navy }bruce
}plow }grapnel
}bruce }mushroom
keel types
bar keel
flat plate keel
bar keel-vertical or upright members which increase strength,protects the boats hull plating if the boat grounds on a hard bottom. reduces rolling. it increases the boats draft extending below the plating.
flat plate keel-has a plate that is perpendicular to the centerline of the hull. a vertical center keel that runs internal to the hull at the centerline typically supports the flat plate keel.
define keel
2 types
which does the 47 have?
keel-the backbone of the boat. it runs fore and aft along the center bottom of the boat.
bar
flat plate
47’-flat plate keel
parts of the fire tetrahedron?
define
4 parts
define:used to further explain fire combustion and extinguishment. removing one or more of the sides will cause the fire to be extinguished.
Heat
Chemical chain reaction
Oxygen Fuel
classes of fire and extinguishing agents used?
class Alpha-common combustable material (wood,paper,plastic) water,co2,pkp
class Bravo-combustable liquids (oil,fuel,lubricants) AFFF-aqueous film forming foam,co2,pkp
class Charlie-energized electrical equipment (switchboards,breakers) co2,pkp
class Delta-combustable metals (mercury) water wide v,sand under the object, jettison
three methods to apply water straight stream wide V-high velocity fog narrow V-low velocity fog flush
- long reach and penetrating power
- can cool a wide surface area
- less cooling surface area
- not a pattern but is used to clear the nozzle of any debris
water tight compartments. (7)
lazarette-transom/fr1 engine rm-fr1/fr5 survivors cmpt-fr5/fr8 auxillary- fr8/fr10 fwd cmpt. fr10/fr15 forepeak- fr15/bow enclosed bridge-fr8/fr10 main deck
coxswain limits
basic
hwx
surfman
basic
no surf
10 ft seas
30kts wind
heavy weather
8ft surf
20ft seas
50 kts wind
surfman
limits of the vessel
47’ mlb max limits
Maximum Personnel (including crew) Maximum Seas
Maximum Breaking (Surf) Seas Maximum Winds
Range (Cruising RPM in Calm Water) Maximum Operating Distance from Shore Maximum RPM
Maximum Speed
Cruising RPM
Cruising Speed
Towing Capacity (with 3 1⁄4” Towline) Towing Capacity (with 2” Towline) Ice Breaking Capability
34 (180 lbs each) 30’
20’
50 KTS
200 NM
50 NM
2100 RPM
25 KTS
1850 RPM
20 KTS
150 Displacement Tons 50 Displacement Tons Light Surface Ice
antenna heights?
fixed
df
unfixed
18’6”
24’6”
28’4”
planning hull define, examples
the hull skims along the surface of the water under power
speed boats, drop bows, 25’ rbs
semi-displacement hull define, example
partially displaced and partially planning.
47’ mlb
displacement hull define, examples
pushes away displaces water allowing the hull to settle down into the water.
sailboats, most commercial fv, 52mlb
what is light/heavy displacement?
the weight of the boat excluding the weight of the fuel,water,outfit,cargo,crew, and passengers.
the weight of the boat including the weight of the fuel,water,outfit,cargo,crew, and passengers.
stability tree
longitudinal/transverse
____________I____________
gravity buoyancy
_____I_____ _____I_____
static dynamic static dynamic
define static and dynamic
two forces that affect vessels stability.
static-weight within the hull(fuel,water,gear)
dynamic-actions outside the hull(wind,waves,swells)
stability define: longitudinal transverse righting moment
longitudinal-fore/aft. prevents it from pitching end over end
transverse-athwartship.stability tends to keep the boat from rolling
righting moment-is the force causing the vessel to react against a roll and to return to an even keel.
47mlb hull specs design material bottom plating side shell chine plates keel plates
design-deep-v planning hull from bow to stern while #rd transom/bow material-5456 marine grade aluminum bottom plating-5/16" side shell-1/4" chine plates-3/8" keel plates-1/2"
explain:
- cooling
- smothering
- chain breaking
- oxygen dilution
- reduces the temp below ignition point
- separates it from its oxygen supply
- disrupts the chemical process necessary to sustain a fire
- a smothering process that reduces the amount of oxygen available to a level below that required to sustain combustion.
define stability
the tendency of a vessel to remain upright
center of gravity
the point at which the weight of the boat acts vertically downward
buoyancy
the upward force of water displaced by the hull
equilibrum
when a boat is at rest, the center of buoyancy acting upwards(vertically) is below the center of gravity acting downward. at this point the boat is considered to be in equilibrium.
parts of a keel?
define
name
frames-attached to keel which extend athwartship(from one side to the other) the skin of the boat is attached to the frames. the keel and the frames strengthen the hull to resist external forces and distribute the weight.
stem-an extension of the forward end of the keel. there are a common number or shapes, all are normally slanted forward(raked) at an upward angle to reduce water friction.
sternpost- a vertical extention of the aft end of the keel
what is: displacement gross ton net ton dead weight
the weight of a boat , and is measured in long tons(2,240lbs)
the entire cubic capacity of a boat expressed in tons of a 100 cubic feet
the carrying capacity of a boat expressed in tons of 100 cubic feet. it is calculated by measuring the cubic content of the cargo and passenger spaces.
the difference between the light displacement and the max loaded displacement of a boat, and is expressed in long tons or lbs.
responsibilities of a boat crewmen.
helm lookout towing watch anchor watch rig towing and mooring lines act as a surface swimmer administer first aid damage control
personal locator beacon (PLB) stats
epirb route
406mhz- 3nm
121.5mhz-15nm
epirb->cospas->noaa->mission control->rescue coordination center->local search and rescue->d-13->sector columbia river->station.
towing terms define yawing in step catenary
yawing-disabled veers from one side to the other, which may cause one or both boats to capsize
in step-the proper distance between the towed boat and the towing boat to maintain control and prevent breaking the tow line.
catenary-a dip or downward sag that forms in the middle of the towline as it is lengthened.
47 boat specs hull length overall beam overall freeboard -bow -recess -aft draft
hull length-48'11" beam-15' bow-6'8" recess-2'2" aft-7'1" draft-4'6" at the shaft strut ext.
