BCH Boat Operations Flashcards
What are the six Coxn Responsibilities?
- Safety and Conduct of passangers and crew
- Safe operations and navigation of the boat
- Completion of mission or sortie
Respond - Hazards to life or property
- Violations of laws or regs, not auxiliarist.
- DISC to ATON
There are three basic boat crew positions on boats:
(01) Coxswain,
(02) Engineer,
(03) Crew member
An auxiliarist on official orders may perform many Coast Guard duties, including:
boat crew member and boat engineer, but is not a military member of the Coast Guard
duties of a trainee are to learn and safely perform the practical tasks prescribed for crew members?
Helmsman, Lookout, Towing watches, Anchor watch, Assist with piloting and navigation.
Helmsman, Rig towing and mooring lines, Act as the boat swimmer.
Administer first aid, Operate damage control equipment
Lookout may report bearings in ?
Relative only
Bearing are always reported in 3 digits?
ZE ROH - WUN- TOO- TREE- FOWER- FIFE- SIX - SEVUN - AIT - NINER
Objects in the sky are located by their
relative bearing and position angle.
position angle of an aircraft is its height in degrees above the horizon as seen from the boat. The horizon is?
0° and directly overhead is 90° or“Zenith.” The position
There are two common scanning methods:
(01) Left to right and back again.
(02) Top to bottom and bottom to top.
One technique is to scan in small steps of about 10° and have them slightly overlap while moving across the field of view.
The helmsman is responsible for the following
Safely steering the boat.
Maintaining a course.
Carrying out all helm commands given by the coxswain.
There are two methods to determine if the anchor is dragging:
(01) Check for tension on the anchor line.
(02) Check the boat’s position.
swing circle’s radius - is equal to the boat’s length plus the length of anchor line/chain that has veered
(Example: 40-foot boat + 150 feet of anchor line
out = 190-foot swing circle).
Fatigue reduces the power of?
observation, concentration , and judgement.
how many symtoms of fatigue are there?
- Inability to focus or concentrate/narrowed attention span.
- Mental confusion or judgment error.
- Decreased coordination of motor skills and sensory ability (hearing, seeing).
- Increased irritability.
- Decreased performance.
- Decreased concern for safety.
Coxswains must be aware of the dangers that exist when crewmembers
push themselves beyond reasonable limits of performance
Some preventive measures are:
- Adequate rest.
- Appropriate dress for weather conditions.
- Rotating crew duties.
- Providing food and refreshments suitable for conditions.
- Observing other crewmembers for signs of fatigue.
Personnel in a duty status
shall not consume alcohol for a
minimum 12 hours prior to assuming duty.
What is Inertia?
inertia is the tendency for a vessel at rest to stay at rest. The more mass a vessel has (the greater its displacement), the harder it is to get it moving
Set a Course to Lessen the Effect of the Seas
Do not try to tow a vessel either directly into or directly down large seas. Tow on a course to keep the seas 30°-45° either side of dead ahead or dead astern.
what is a pendent?
A pendant is used to reduce wear and chafing at the towline end (particularly the eye and its splice).
what is a bridle?
A bridle or “Cats Paw” is used when both legs can be rigged to exert an equal pull on the hull of a distressed vessel, and is preferred for heavy weather towing
Drogue has how many feet of 2 inch DBN?
200 ft
where is the danger zone established on a tow approach?
from the outside, size of the danger zone depends upon conditions and arrangement.
What is optimum position?
Optimum position is the position taken by the rescue vessel which allows the crew the safest opportunity to pass the towing equipment to the vessel to be
towed.
Optimum position provides better vessel control, while keeping appropriate distance from the distressed vessel and maintaining a safe escape route in case of an emergency.
what is maneuvering zone?
90 arc; 45 degrees fwd and 45 degrees aft of your tow bitt.
when passing the heaving line, how much shall you have in one hand?
2/3
Opening maneuvers consist of?
opening by pivoting or opening by backing.
closing maneuvers consist of?
closing by pivoting or closing by quartering.
What are the two methods of tow rigging?
attach to the tow rig to fittings or tow rig to trailer eye
Gravity causes a ?
“dip” or downward sag (known as catenary) to form in the middle of the towline as it is lengthened. This catenary acts as a natural shock absorber for a tow rig and is a major factor in counteracting shock-loading
what is minimizing Yaw?
The tow is said to yaw when it veers to one side or the other. Yaw can be caused by trim (including list, heeling or rolling, or by a bow-down attitude), rudder problems and wave action.
What is the formula for towing?
- S = Maximum towing speed (hull design speed)
- Ss = Maximum safe towing speed
- Lw = Square root of length at waterline
- S = 1.34 x Lw
- Ss = S - (10% x S) a 10% reduction in the maximum towing speed
- S = 1.34 x Lw
- S = 1.34 x (square root of 36)
- S = 1.34 x 6
- S = 8.0 knots
- Ss = 8.0 - (.1 x 8.0)
- Ss = 8.0 - .8
- Ss = 7.2 knots
What are the two methods of side approach?
Transitions approach-
Drop tow approach-
Calm conditions shall rig tow as follows?
- stern to stern
- tow strap fwd line to line 3
- Rig a backing strap (aft spring line)
If conditions are setting the vessels into danger (e.g. toward shoals or breakwaters) with the bow line attached, and time is critical, use the following line procedures to secure lines alongside?
(01) First: Rig a tow strap (forward spring line) so that once secured, the towing vessel can put headway on and move clear of any dangers.
(02) With headway still on, rig a backing strap (aft spring line) and/or stern line. These will be needed to slow or control the towed vessel.
what is your best approach in heavy weather to tow?
Bow must be kept square to the seas. By keeping your bow straight into the sea conditions, you will maintain better control of your boat. the position gives you the safest approach, best visibility of your boat, your crew, the disabled boat, and the sea condition.
when shortnening a tow. what course shall you take?
Before beginning, the coxswain takes up a course 10° to 15° off the seas with tow to windward.
When do you use a Urgent marine information broadcast?
for emergencies only
Mayday mayday mayday is used for?
grave or immenent danger only.
The two most common methods for recovering a PIW are:
01) Direct- direct pick up method involves the boat’s maneuvering in order for the crew to directly recover the PIW on deck – without the use of a rescue heaving line or boat hook.
(02) Indirect- indirect pickup method requires the boat to deploy a boat swimmer, or a crewmember to pass a line (rescue heaving line, mooring line, etc.) to the PIW.
The coxswain must select an approach that is suitable for the existing conditions. There are two basic approaches:
(01) A leeward approach (against the wind and current),
02) A windward approach (into the wind and current.
if an individual falls overboard during periods of darkness or restricted visibility, and the exact time of the incident is unknown you use the ?
Williamson Turn- The advantage of the Williamson turn, when properly executed, is that it will position the boat on a reciprocal course from your original track.
Alter the course 60° to port or starboard from the original course.
Swimmer signals are for tap top of the head?
one arm raise over head? one arm waving over head? two arms waiving?
one tug = tap on the head = i am ok
two tugs = one arm raising over head means= advance
three tugs= one arm waiving over head= take in slack
four tugs = two arm waiving = do you need help or help
first strap that shall be used on stokes litter?
gray, then blk which is 18-24in at the head 45 degree angle
Multiple PIW Recovery ?
- Are one or more persons in the water injured?
- Which persons in the water have on PFDs and which do not?
- How close are the persons in the water to the beach or jetty?
- How old are they and what is their physical condition?
What is tripping?
If the towing boat turns sharply to either side, tripping can occur.
Tripping is when a boat is pulled sideways by an opposing force.
If a PIW happens from the towed vessel what do you do as a coxn?
If the PIW takes place in restricted waters, the disabled vessel should be anchored as soon as the tow is released.
During a heavy wx turn you should never do what with the throttles?
Never split the throttles, this could cause a knockdown or rollover and should be avoided.
what is spontanious ignition?
occurs by self heating, which accelerates to high temps and finally autoignition.
What is oxidation?
Oxidization is a natural process that produces heat.
Heat produced by oxidization causes any remaining oil to oxidize even faster and produce still more heat.
what is a fire hose?
It comes in 2 common diameters, 1½-inch or 2½-inch, and is produced in standard lengths of 50 feet.
A minimum of 2 people is recommended to control a 1½-inch hose.
what is the fire fighting policy?
CG personal shall not engage in independent fire fighting operations, except to save a life or in the early stages of a fire to avert/prevent a significant threat w/o undue risk.
CO2 is a colorless gas about 50 percent heavier than air.
CO2 should never be used alone to fight a major fire.
effective range for the portable CO2 extinguisher is approximately 5 feet.
CO2 from a fully charged 10-pound extinguisher will last approximately 40 to 45 seconds.
PKP effectiveness?
Most dry chemical/PKP extinguishers have an effective range of 10-12 feet and will last between 8- 20 seconds in continuous use.
dry chemical PKP extinguishes flames by breaking the combustion chain.
Never fight a fire until ?
an alarm has been sounded.
The MH-65“Dolphin” has two turbine engines that will produce a maximum airspeed of? size of crew?
175 kts with rescue swimmer iaw three crew members.
Where does the pilot sit?
during hoisting sits on the right seat of the cockpit.
Max endurance on dolphin? max passangers? hoist capacity?
3hrs
max - is 4 passangers
hoist is 600 lbs
The MH-60 “Jayhawk” has 2 turbine engines that, depending upon the gross
weight of the helicopter, will produce a maximum airspeed of?
180 kts
Normal crew is ?
two pilots and two crewmembers plus a rescue swimmer during rescue missions.
Max endurance and hoist capacity?
six hours and 600 lbs hoist capacity and cannot float.
Helo trail line consist of ?
The trail line consists of 105 feet of orange polypropylene line with a weak link and snap link at one end, and a snap hook at the other.
The pilot normally will direct the coxn to assume course and speed of?
15-30 kts and 35-45 degrees of the port bow.
When a boat is dead-in-the-water (DIW), the helicopter may approach the boat’s?
bow or stbd beam. And will always turn clockwise due to the downwash.
Delivery of a rescue device from the helicopter to a vessel in distress or for training will be accomplished by one of the following three methods:
- Direct delivery.
- Trail-line delivery.
- Indirect delivery.
If a boat loses engine what must the Coxn do?
Coxn must maintain course and speed to prevent pulling the device off the boat and fouling cables.
Coxn will add power to the good engine and turn toward the good engine in order to maintain course and speed.
How many emergency exits does the HH-60 have? and the MH-65?
Jayhawk has 5 emergency openings.
Dolpin has 4 emegency openings.
