Assessment Test

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1. An ocean towing bridle whose legs are of equal length, but too short, may __________.


2. The choice of length of tow bridle legs is governed by the __________.


3. While towing, sudden shock-loading caused during heavy weather can be reduced by __________.


4. The connection to the towline must be secured with a _________.


5. On board a mobile offshore drilling unit, the key to the most rapid and effective response to a man overboard situation is __________.


6. In a storm, the leeward lines of a MODU's mooring system will __________.


7. Scouring usually occurs with soils such as __________.


8. The overturning forces acting on a floating jack-up are generally dominated by __________.


9. During a storm, the mooring line on a MODU should be long enough so that the angle between the anchor shank and the ocean floor is __________.


10. The time required to ballast the DEEP DRILLER to survival draft, when threatened with heavy weather, while under tow, is about __________.


11. In case of damage to the DEEP DRILLER on location, the immediate objective is to reduce the unexpected inclination and return the unit to __________


12. What are reef points used for?


13. As a vessel falls off the wind from close-hauled to a beam reach, the tendency for the vessel to move sideways through the water will __________


14. You are at the helm of a sailing vessel under sail on the starboard tack, close hauled, and you are instructed to "head up". You should __________.


15. Your 80-ton schooner is hove to on the starboard tack under storm trysail and fore-staysail in 45 knots of wind. Your heading is averaging about 000° true and the wind is from the northeast. There is a dangerous shoal bearing 270° true, range 5 miles. Which action would be appropriate?


16. You are under sail on a close reach, and the wind is steady. While steady on course, you reef the mainsail and your speed slows. The apparent wind __________.


17. When shifting to a course where the wind comes more from astern, easing the mainsheet will __________.


18. When anchoring a small sailing vessel in rough weather, the best anchor line would be composed of __________.


19. With regard to aerodynamic lift, which statement is TRUE?


20. If you were to jibe in a strong wind, the part of the rigging most likely to fail would be the __________.


21. You are sailing on a close reach when a strong wind suddenly heels the vessel hard over. To reduce the heeling and yet maintain speed, you should __________.


22. Your 20-ton ketch-rigged sailing vessel is sailing close hauled on the port tack in a moderate breeze with all sails properly trimmed. You wish to bear off quickly to avoid a floating hazard. To utilize your sails to assist with the turn, you should __________.


23. Changing direction by bringing the stern of the vessel through the eye of the wind is known as __________.


24. If you reef a marconi mainsail, the sail area __________.


25. A "loose" tow may cause all of the following EXCEPT __________.


26. What shape barge offers the least resistance in river towing?


27. You are being towed by one tug. As you lengthen the bridle legs you __________.


28. When towing, what is the main reason for using a chain bridle on a wire hawser?


29. What is the greatest danger of an overriding tow?


30. A towing hawser should be stowed __________.


31. The circular steel structure installed around the propeller of a towboat is the __________.


32. You are inspecting the nonmetallic oil transfer hoses on the vessel you operate. The maximum allowable pressure of the hose is 70 psi. Your inspection confirms the hose did not burst, bulge, leak or abnormally distort under the required static liquid pressure of __________.


33. In securing a towing cable, consideration must be given to letting go in an emergency. The possible whip of towlines when released can be overcome by __________.


34. When making up a long, large coastwise tow, which of the following procedures is INCORRECT?


35. A lashing used to secure three or four barges at a common corner, lashed in an "X" fashion, is called a __________.


36. The owner or Master of a vessel pushing ahead or towing alongside must ensure that each of the following is appropriate for the vessel's horsepower and tow arrangement EXCEPT __________.


37. How many legs does the bridle for an ocean tow have?


38. When connecting the tow bridle to a tug, the end of the bridle is passed with a __________.


39. A towing hook may be released from the __________.


40. What does "in step" refer to in regards to towing?


41. When towing astern, one way to reduce yawing of the tow is to __________.


42. An ocean towing bridle should __________.


43. When towing astern, chafing gear should NOT be used on a hawser which is __________.


44. On a long ocean tow, the bridle should be made up of two equal lengths of __________.


45. When towing, the least amount of tension will be on each bridle leg when the two legs __________.


46. When a tow is trimmed by the stern it is said to __________.


47. Your vessel is being towed and back-up wires have been installed. Back-up wires carry the towing load in the event that the __________.


48. The amount of force a tug can exert on a stationary pull is called its __________.


49. The static bollard pull of a tug is measured in tons and consists of the brake horsepower of the tug's engine divided by 100 and multiplied by a factor of __________.


50. What purpose does a tow hook serve?


51. A towline should be fastened to __________.


52. In a tow made up astern, the fishplate __________.


53. A towing vessel becomes tripped while towing on a hawser astern. What factor is LEAST important when assessing the risk of capsizing?


54. Synchronous towing means that the __________.


55. Where should a vessel being towed alongside be positioned for increased maneuverability?


56. The main reason a long towline is used during an ocean tow is that __________.


57. Which statement concerning an automatic towing engine is FALSE?


58. What imminent danger results from tripping?


59. A tug's horsepower available at the shaft is __________.


60. As seen from the tow, what should connect the leading ends of both towing bridle legs to the main towing hawser?


61. Which statement is FALSE about using a wire bridle on an ocean tow?


62. You would be most likely to use a fishplate __________.


63. A tow that veers to the side on the end of the towline is said to __________.


64. While towing, bridle legs of unequal lengths may cause __________.


65. What safety precautions must you take when maneuvering on a towing hook?


66. You have been towing astern and have just let go the tow. Your deckhands are pulling in and faking the towline by hand on the stern. The most dangerous action to take is to __________.


67. You are towing a large barge on a hawser. Your main engine suddenly fails. What is the greatest danger?


68. What is the principal danger in attempting to swing a barge on a hawser in order to slow the barge's speed?


69. A vessel brought alongside should be fended off the towing vessel by __________.


70. An advantage of the modified Christmas Tree towing method is to __________.


71. A tug is "in irons" when held in a fixed position by __________.


72. The term "overriding" or "overrunning" when applied to towing, implies that __________.


73. To overcome the effects of static forces between two vessels of vastly different tonnages that may potentially part a line, you should __________.


74. The motion that can significantly increase mooring line tension is __________.


75. When sailing with the wind aft, a vessel may carry sails on both sides at the same time. The sails are __________.


76. You are attempting to recover a mooring buoy. If you approach the object on the port tack, how would you slow the vessel as you draw near?


77. Which statement is TRUE concerning a sailing vessel with the sails properly trimmed?


78. Your vessel is drifting with the wind broad on the port beam. The marconi sail is set and flapping free. As you sheet in the maximum drive is attained when the sail __________.


79. You are at the helm of a sloop-rigged sailing vessel under sail on the port tack, on a beam reach, with all appropriate sails set and properly trimmed. You are instructed to "head up quickly". To utilize your sails to assist with the turn, you should __________.


80. Which action will NOT reduce heeling of a vessel when sailing on a tack?


81. You are sailing in a strong wind and may accidentally jibe when __________.


82. You are sailing into a harbor with the intention of picking up your mooring. There is no current. Which statement(s) is(are) TRUE?


83. A ketch-rigged sailing vessel is sailing to windward with the wind about 50° on the port bow. All the sails are set and drawing properly. Which statement is TRUE?


84. Which statement(s) is(are) TRUE regarding heaving-to?


85. You are at the helm of a ketch-rigged sailing vessel under sail on the starboard tack, close hauled, with all appropriate sails set and properly trimmed. You are instructed to "bear off quickly". To utilize your sails to assist with the turn, you should __________.


86. A tow of 9 barges is made up three abreast and three long. The towboat is faced up to the center string which is known as the __________.


87. Kort nozzles are installed around the propellers of some vessels to __________.


88. You are in the process of adding a barge to your tow. A line run from your power capstan and around timber heads on your tow is made fast on the new barge so that it can be pulled into position. This line is called a __________.


89. Is tripping limited to harbor and coastal towing?


90. It is good practice to use long towlines for ocean tows because the __________.


91. In astern towing, a tow span, also called the "tow bar" or "towing arch", is used to __________.


92. How many wire clips must be used to make a temporary repair to a tow wire?


93. Where is the best location to install a towing hook?


94. What may prevent a tug from tripping or capsizing when towing a large vessel?


95. When towing astern, each towline must meet all of these requirements, EXCEPT _________.


96. Once a towline is connected between the towing vessel and the disabled vessel, the towing vessel should __________.


97. Catenary as applied to tow lines denotes the __________.


98. On a shallow water tow, the catenary of the towline should be __________.


99. When a tug is "in irons", she __________.


100. Indicated horsepower refers to a towing vessel's power which is __________.


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