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USCG AUX COXSWAIN 6- 3
COX- 08 - 02 - 1...... Stated causes and effects of static forces and how to overcome the effect of static force when starting a tow and when changing the towing vessel's heading. - ✔✔Static forces cause a towed vessel to resist motion......... Overcome the effects of static forces by starting a tow slowly, both on the initial heading or when changing the towed vessel's heading..........Inertia and the moment of inertia are two different properties of static forces that cause resistance in towing vessels.....Once making way, the effects of static forces lessen. COX- 08 - 02 - 2.......Stated types, causes, and effects of dynamic forces. - ✔✔Dynamic forces occur once the towed vessel is moving. They are based on the towed vessel's characteristics (shape, displacement, arrangement, rigging), the motion caused by the towing vessel, and the effects of waves and wind......Momentum is Once a vessel moves in a straight line, it wants to keep moving in a straight line. The greater its displacement or the faster it is moving, the harder it is to stop or change the vessel's direction.
COX- 08 - 02 - 3.........Stated causes of towline strain. - ✔✔Towline can be strained when the vessel overcoming the vessels static force.....Higher towing speed causes higher frictional resistance and more strain on the towing rig..... Vessel that is not in step will put a strain on the towline. COX- 08 - 02 - 4........Stated cause and effect of shock load and techniques to prevent, counteract, or reduce its effects. - ✔✔Shock-load" or "shock-loading" is the rapid, extreme increase in tension on the towline, which transfers through the tow rig and fittings to both vessels. Slowing down....longer towline..... tow in step..... Deploy a Drogue from the Towed Vessel .....Adjust Towing Vessel Speed to Match that of the Towed Vessel will reduce the effect of shock-loading. COX- 08 - 02 - 5 - A Stated effect that the following have on shock load: Reducing towing speed - ✔✔Slowing down lowers frictional resistance, form drag, and wave making resistance.......Vessels in step will gain and lose momentum at the same time, allowing the towing force to gradually overcome the towed vessel's loss of momentum, minimizing shock loading
COX- 08 - 02 - 5 - F..............Stated effect that the following have on shock load:...........Constantly adjusting the towing vessel's speed to match that of the towed vessel - ✔✔This will enable both vessel speed to be matched and keep tension on the towline. COX- 08 - 02 - 6 - A.........Stated the effect different hull types have on dynamic forces:.........Displacement hull - ✔✔Once a vessel moves in a straight line, it wants to keep moving in a straight line. The greater its displacement or the faster it is moving, the harder it is to stop or change the vessel's direction.....A displacement hull boat pushes away (displaces) water allowing the hull to settle down into the water. Underway, the hull pushes out this water, creating waves COX- 08 - 02 - 6 - B...........Stated the effect different hull types have on dynamic forces:.........Planing hull - ✔✔Going from displacement speed to planing speed, or back, can decrease the towed vessel's stability and cause it to capsize. Also, wave drag (even one large wake) could slow the hull down to displacement speed and cause a severe "shock-load" as the towed vessel tries to get back on plane
COX- 08 - 02 - 6 - C...........Stated the effect different hull types have on dynamic forces:.........Semi-displacement hull - ✔✔up to a certain power level and speed (power/speed ratio), the hull remains in the displacement mode. Beyond this point, the hull is raised to a partial plane... If the vessel goes into a plane it can capsize. COX- 08 - 02 - 6 - D...........Stated the effect different hull types have on dynamic forces:.........Multi-hull - ✔✔Multi hull will resist turns so you will have to perform this at a slower speed to change the direction of the inertia. Define a Datum Line - ✔✔A Datum line is used when the location cannot be pinpointed, but the intended track line or line of bearing can be determined. Without more info it is assumed the vessel can be anywhere along the length of the plot. Radio direction finder could provide a bearing or lop. Task .... 2-1...... Listed four of the ten indicators of impending precipitation. - ✔✔1... Western Sky Red at Dawn... 2... South Wind and clouds moving from the west.... 3... Halo around sun or moon.... 4... Barometer Falling.... 5... Increasing south wind clouds moving from the west. Task .... 2-1......
Task .... 2-2..... Determined wind and sea conditions. - ✔✔Sea conditions can be observed by white caps. Visual Hight of the wave and how they break. Wind can be observed by the movement of a flag, amount of water spray from breaking waves. The way the forces of the wind are acting on the vessel. Task .... 2-2..... Stated the causes and effects of...... down flooding - ✔✔Down flooding is the entry of water into the hull, resulting in progressive flooding and loss of stability. Task .... 2-2..... Stated the causes and effects of...... free surface effect - ✔✔Liquid that only partly fills a compartment is said to have free surface and water........ When loose water shifts due to turning..... speed changes.... or wave action.... the vessel does not want to right itself Task .... 2-2..... Stated the causes and effects of......
topside icing - ✔✔Icing can increase the displacement of a boat by adding weight above the center of gravity causing the center of gravity to rise. This can cause a vessel to heel over and greatly reduce stability. Task .... 2-2..... Stated the causes and effects of...... free communication with the sea - ✔✔Damage to the hull of a vessel can create free communication with the sea, which is the unobstructed movement of seawater into and out of the vessel. Task ...... 5-3..... Correctly plotted and labeled each compass course on the chart. - ✔✔ Task ...... 5-3..... Determined compass courses for each magnetic course. - ✔✔If you go from Compass to Magnetic you need to Add the Deviation if W or Subtract Deviation if E. Task ...... 5-3..... Determined magnetic course for each true course. - ✔✔If you go from True to compass and west you add.
Task ....4-2....... Demonstrated short blast. - ✔✔1 second Task ....4-2....... Sounded signal for action or intention and answer for a boat altering course to port or passing starboard to starboard. - ✔✔2 Short Blast and Boat will respond with 2 short Blast Task ....4-2....... Sounded signal for action or intention and answer for a boat altering course to starboard or passing port to port. - ✔✔1 Short Blast and boat will respond with 1 short blast Task ....4-2....... Sounded signal for avoiding collision, or when failing to understand the action/intention of another boat (danger signal). - ✔✔5 Short Blast Task ....4-2....... Sounded signal for boat at anchor in restricted visibility. - ✔✔Prolonged- Short- Short Blast Every 2 minute. ....... > 20 Ring the bell every for 5 seconds. > 100 Meters Gong 5 seconds. Task ....4-2.......
Sounded signal for boat being towed astern in restricted visibility. - ✔✔....one prolonged and 3 short blast....... A vessel towed or if more than one vessel is towed the last vessel of the tow, if manned, shall at intervals of not more than 2 minutes sound four blasts in succession, namely one prolonged followed by three short blasts. When practicable, this signal shall be made immediately after the signal made by the towing vessel. Task ....4-2....... Sounded signal for boat not under command or with restricted maneuverability in restricted visibility. - ✔✔sound at intervals of not more than 2 minutes three blasts in succession, namely one prolonged followed by two short blasts.. Task ....4-2....... Sounded signal for boat with stern tow in restricted visibility. - ✔✔.......One prolonged and 2 short blast..... sound at intervals of not more than 2 minutes three blasts in succession, namely one prolonged followed by two short blasts. Task ....4-2....... Sounded signal for operating astern propulsion. - ✔✔three short Blast
Task ....4-3....... Proper light displayed for vessel underway. - ✔✔360 white Light...... a Red side light on forward port side 112.5 Green side light Forward Starboard side 112. The 360 all around white light could be a forward mast head 225 and a stern light 135 deg. If the vessel is over 50 meters it will require a Second masthead light abaft of and higher than the forward one; Task ....4-3....... Proper lights displayed or explained for towing a vessel astern. - ✔✔Yellow over White Task ....4-3....... Properly lights displayed or explained for towing a vessel alongside. - ✔✔Yellow over white Task 6- 10 - 2 Made initial Contact with the distress boat on channel 16 - ✔✔First thing to ask. Position, number of people on board and nature of distress. ................................................................................... Use SAR incident check-off sheet found in the U.S. Coast Guard Addendum to the
United States National Search and Rescue Supplement (NSS) to the International Aeronautical and Maritime Search and Rescue Manual, COMDTINST M16130. (series). Task 6- 2 - 5..... Define a non distress case - ✔✔Not in the Emergency Phase Task 6-3.....a Defined the Uncertainty phase of a SAR incident. - ✔✔When you have knowledge of a situation which needs to be monitored or when you have more information to gather and does not require dispatching resources..... Usually when there is doubt......doubt.......doubt about the safety of a vessel or if overdue or failed to make an expected report..... A pre communication search is done during this phase by contacting facilities or agencies in the specific area to locate or determine if the vessel has been seen...... Task 6-3.....b Defined the Alert phase of a SAR incident. - ✔✔This phase is assigned when vessel or persons are having difficulty and may need assistance,,, but not in immediate danger. Apprehension.....Apprehension.....Apprehension is usually associated with the alert phase, but no known threat requiring immediate action is required. SUR may be dispatched if it is believed the conditions might
Defined corner point search area description. - ✔✔Corner Point In the corner point method, the latitude and longitude (or geographic features) of each corner of the search area are given. The search will be inside the four corners. Used in Creeping line or parallel single search patterns. Task 6- 4 - 4 ..... Defined center point search area description. - ✔✔The Center point will be the center point start of the search used on Victor Sierra and the Expanding Square. Task 6- 4 - 5..... Defined boundary method search area description - ✔✔Boundary Method. Any square or rectangular area oriented east/west or north/south can be described by stating the two latitudes and two longitudes. While an area defined by meridians and parallels is not exactly rectangular, this approximation is sufficient for low to middle latitudes. At high latitudes other methods should be considered for specifying rectangular areas. Any inland search area that is bounded by prominent geographical features can be described by stating the boundaries in sequence. For example:
(1) D-7 Boundaries 26N to 27N, 64W to 65W. (2) A-1 Boundaries Highway 15 to the south, Lake Merhaven to the west, Runslip River to the north, and Bravado mountain range to the east. (3) Landmark Boundaries Method. Two or more landmarks are given as boundaries of the search area along a shoreline. For example: Search area from "Port Alpha" South Jetty, south to the Tower to 10 NM offshore (Figure H-26) Task 6- 4 - 6..... Defined track spacing (TS). - ✔✔Track Spacing. Track spacing (S) is the distance between adjacent parallel search legs. The desired track spacing is a function of corrected sweep width, which is a measure of detection capability and will vary with search object type and environmental conditions, and the desired coverage. For a given desired coverage, the more difficult an object is to detect, the closer together the search legs must be. Task 6- 4 - 7..... Stated items included on a pre-search check list. - ✔✔Nature of distress, Last known position, description of object, Number of people
Described Parallel Search (PS), both single unit (S) and multi unit (M), and described the conditions in which they are most likely to be used. - ✔✔Papa Sierra, Parallel Single Unit. Search area is large, Location of the search object is approximate. Uniform coverage is desired. The SRU searches Parallel to the Long side (Major Axis) of the search area. Moving over one track on the return. The CSP is located 1/2 Track space inside the search area in the specified corner. Parallel search can be performed with other SRU taking on a track line and returning with #SRU + 1 Task 6- 4 - 8 - D..... Described Creeping Line Search (CS), both single unit (S) and multi unit (M), and described the conditions in which they are most likely to be used. - ✔✔Creeping line Single unit (Charlie Sierra). Search area is large. Location of the object is aproximate chances the object is at one end of the search area versus the other. (Debris was found) SRU searches the short side (minor Axis) of the search area move over one track per return. CSP is located 1/2 track space inside search area in a specified corner. Task 6- 4 - 8 - E..... Described Track line Single-Unit Return (TSR), both single unit (S) and multi unit (M), and described the conditions in which they are most likely to be used. - ✔✔Tango Sierra Romeo. Trackline Single Unit Return. (TSR). Intended route of the search area is known. First effort in overdue case and assumed the object is near its track. SRU searches out 1/2 track space in direction of intended Track from origin to the destination and ends 1/2 track spacing on the other side of the origin.
Task 6- 4 - 8 - F..... Described Barrier Search (XSB), both single unit (S) and multi unit (M), and described the conditions in which they are most likely to be used. - ✔✔Barrier: The Barrier pattern is used in areas with strong current, such as a river. The search lies along the path of the current. The search unit moves back and forth over the same track. Task 6- 4 - 8 - G..... Described Initial Response Search area, both single unit (S) and multi unit (M), and described the conditions in which they are most likely to be used. - ✔✔With a single unit one SRU is available and starts the search. Multi Unit you have a second vessel. when second SRU arrives they would start the search at CSP and 30deg right for VS, 45 deg right for SS and Next track line for PS. Task 6-4..... Define a Datum Point - ✔✔A point is the center of the area where it is estimated the object is located...... Task 6-4..... Defined datum. - ✔✔This refers to the most probable location of the vessel in distress, corrected for drift over a given period of time..... Depending on the information available and accuracy a datum may be a point , line or area....
