Ans capstan note review ships nomencalature

1. A vessel of 1100 tonnes displacement has a KG of 6.30m. A jumbo derrick is used to shift a 0weight of 250 tonnes from the lower hold (KG of 3m to the upper deck (KG 8.5m). The head of the derrick is 19.50m above the keel. Find the KG of the ship when the shifting is over.

(ans 6.425m)
11000 Kg = (11000x 6.3) + (250x 8.5) – (250 x 3)
11000 Kg = 70675
Kg = 6.425m

If it floats at a mean draft of 6m in water density of 1020kg/m3. What is the value for bouyancy given by the water to the pontoon? (ans 13709 tonnes)

4. A ship 110m long floats on an evel keel draft of 4.85m with center of floatation of 1.30m forward of amidship. A load of 30 tonnes is moved forward until the draft forward is 5.05m. Through what distance is it moved? The MCT 1cm may be taken as 64 tonnes meters. (ans 87.50m)

8. A vessel of 1792 tons displacement is inclined by shifting 5 tons already on board transversely across the deck through 20 ft. The needle of the plumb line 15 ft long moves through 5.50 inch.

Determined the metacentric height at the time of experiment. ( ans 1.83 feet)

what will be the draft in salt water. (ans 8 ft)

40 tonnes mass already on board is shifted from the ‘tween deck to the lower hold through a distance of 4.5 meters vertically. (ans 10.41 m)

where the density of the water is 1008 kg/cu m. If she is to remain at the salt water draft, find how much cargo must be discharged. (ans 106.10 tonnes)

The number of persons which a lifeboat may be certified to carry is equal to the greatest whole number obtained by the formula V/x where ‘V’ is the cubic capacity of the lifeboat in cubic metres and ‘x’ is the volume in cubic metres for each person. ‘x’ is 0.283 for a lifeboat 7.3 metres in length or over, and 0.396 for a lifeboat 4.9 metres in length. For intermediate lengths of lifeboats, the value of ‘x’ is determined by interpolation.

25. A measure of the cubic capacity of the ship in which 1 ton is equivalent to 100 cubic feet. (ansgross tonnage)

26. A prominent appendage attached to the bow in order to reduce resistance and thus reduce horsepower. (ans bulbous bow)
Note: Bulbous bow is not considered as an appendage.

(ansblock coefficient Cb)

38. The second moment of a ship’s water-plane area about the center line is 20 000 m4 units. The volume of displacement of the ship is 6944 cu m. Calculate the initial metacentric height.

(ans 2.88m)

even keel of 6m draft. Calculate the transverse metacentre BM. (ans 2m)

moment of statical stability. (ans 2100 tonnes m)

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46. A box-shaped vessel 70m x 13m x 7.5m and floats in salt water and a 58 tons of cargo was loaded on an even keel at 5m draft. Find the parallel sinkage. (ans 6.22 cm )

stability is 600 tonnes m. Calculate the initial metacentric height GM. (ans 0.44m)

(ans 5400 tonnes by the head)

52. A ship has a displacement of 6000 tonnes, MCT 1cm of 240 tonnes m, and a trimming moment of 5400 tonnes m Fwd. Calculate the change of trim. (ans 22.5 cm by the head)

longitudinal matacenter BML. (ans 225m)

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57. A rectangular pontoon with a displacement of 900 tonnes and float in an even keel in FW and carries a mass in the hold of 30 tonnes. The center of gravity of the mass is 3.50 m above the base of the pontoon and the derrick which is to lift the mass has a head 18.50 m above the base.

deck to the bottom of the hold. If the centre of gravity of the cargo is moved through 7.20 m by how much is the metacentric height changed? (ans 0.10 m)

60. A ship had a displacement of 640 tonnes when floating in SW. When inclined the GM was found to be 0.375 m, but there were free surfaces present in: Oil tank FS = 0.0154, water ballast tank FS = 0.0667, fresh water tank FS = 0.0021. Calculate the corrected GM. (ans 0.459 m)

parallel to the side is the moment of inertia of what object. (ans rectangular)

70. The following particulars are known for a ship 120m length, when floating in SW at a mean draft of 7.40m, displacement of 10 580 tonnes, GML of 122.92 m. Calculate the Moment Change of Trim 1 cm. (ans 108.40 tonnes m)

71. A weight of 220 tonnes is added to a ship 120m length with the draft Fwd 5m and Aft 6m, TPC = 14.20, find the parallel singkage of the ship. (ans 15.50 cm)

75. Oil of relative density 0.75 is run into a tank measuring 6m x 4m x 8m until the ullage is 2m. Calculate the number of tonnes of oil the tank then contains. (ans 108 tonnes)

76. A tank will hold 100 tonnes when full of fresh water. Find how many tonnes of oil with relative density of 0.85 may be loaded if 2% of the volume of the oil is to be allowed for expansion.

80. A rectangular tank 3m x 1.2m x 0.6m is floating in FW at a draft of 15cm. Calculate the minimum amount of FW which must be poured into tank to sink it.(ans 1.62 m)

81. A ship is said to be in _______ equilibrium if, when inclined she tends to return to the initial position. (ans stable)

(ans 2,313.86 tonnes m)

85. A tug boat is displaced in the salt water of 59.40 tonnes with a draft of 1.65m, a beam of 4.90m and a length of 15.70m. What is the Block Coefficient (Cb) of the boat? (ans 0.457)

90. The vessel had a length of 30 m, a moulded breadth of 10 m and a draft of 2.20 m, and a block coefficient (Cb) of 0.775 which she float in salt water. What is the displacement of the vessel?

(ans 524.29 tonnes)

94. This is a weight of a ship when completely empty. It is made up of steel weight, wood and outfitting weights and machinery weights. (ans Lightweight)

95. This is the weight that a ship carries. It can be made up of oil fuel, fresh water, stores, lubricating oil, water ballast, crew and effects, cargo and passengers. (ans deadweight)

99. A ship owner has specified to naval architect to design him a 9000 tonnes DWT. Information from a database of previously built similar ships suggests Deadweight coefficeient (CD) to be 0.715. Estimate the fully loaded displacement (W) for this new ship. (ans 12 587 tonnes)

103. A large freezer trawler arrives off her home port with an even keel draft of 20 ft. equal to a displacement of 3,634 tons at salt water . The waterplane area at this draft is 8,820 sq. ft. The vessel is directed to enter in a enclosed basin in fresh water and having depth of 20’-10” along side. Calculate the TPI of a trawler. (ans 21)

104. A large freezer trawler arrives off her home port with an even keel draft of 20 ft. equal to a displacement of 3,634 tons (the density of sea water 1,025 ozs/ cu. Ft). The waterplane area at this draft is 8,820 sq. ft. The vessel is directed to enter in a enclosed basin in which the water density is 1,010 ozs./ cu. Ft. and having depth of 20’-10” along side. If the calculated TPI at this draft is 21 what will be the increase of draft due to change in density. (ans 2.57 in)

106. A curvilinear area has ordinates at a spacing of 2 ft. apart, the length being 1.45, 2.65, 4.35, 6.45, 8.50, 10.40, and 11.85 ft respectively. Find the area of the figure in square feet using Simpson’s 2nd rule. (ans 78.00 sq ft)

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110. A graving dock which had a rectangular lock gate of 20 meters wide, 15 meters deep, has 6 meters of water with density of 1.025 on one side and a water pressure (thrust) of 369 tonnes, while on the other side there is 10 meters of water with density of 1.012. Calculate the thrust.

(ans 1012 tonnes)

115. A cargo ship has a load displacement of 9350 tonnes. Calculate the deadweight if the lightship is 32% of the load displacement. (ans 6358 tonnes)

116. What is an approximate value for the gross tonnage of a ship with 140 meters in length, 20 meters breadth, and 10 meters, depth?(ans 8000 GT)

119. What do call the decreasing of a vessel’s beam above the waterline as it approaches the rail. Opposite of flare. (ans tumblehome)

120. Is an special type ofdrum whose faces are so formed as to fit the links of a certain of given size is called? (ans wildcat)

125.The vessel has a lightship of 755 tonnes and displaced in salt water of 2250 tonnes, with the dimensions of 60 meters x 13.70 meters, 3 meters draft. What will be the deadweight of vessel?

(ans 1495 tonnes)

130.A cargo vessel has a waterplane area of 850 sq mtr and float in salt water. What is the vessel tons per cm (TPC)? (ans 8.71)

131. What is the rounded portion of a vessel’s shell which connects the bottom with side. (ans Bilge)

135. A boat has a volume 2878 tonnes in a draft of 3.2m and a water plane area of 1080 cu mtr. Calculate the vertical buoyancy VCB (or KB)? (ans 1.778 mtr)

136. A ship has the following particulars:
Volume 2668 cu mtr.

140. The vessel undergone deck repair in the shipyard and re-plated a three steel plates of 11mm thk x 1.80 mtr x 5 mtr and two steel plates of 6mm x 1.80 mtr x 3 mtr. Calculate the total weight in kg of the two thickness steel plates. (ans 2841 kg)

141. With no other information the ship has a dimensions of 60m long x 13m wide x 3m depth, calculate the gross tonnage of the ship. (ans 668 or 669 GT)

145. The ship owner needs an approximate steel weight for budgetary purposes to construct a tugboat that can pass in Pasig River. The dimensions of the boat was 65 ft long x 22 ft wide x 11 ft depth, calculate the approximate total steel weight of the tugboat. (ans 56 tons)

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149. If the ship has a TPC =7 and 70 tons of cargo was discharge from a point directly below the center of floatation. Find how much she will float? (ans 10 cm)
150. Find the new draft in a ship which has a TPC of 7, if 70 tons of cargo were discharge from a point directly below the center of floatation and resulted the bodily rise of 10 cm. The original drfat were 3.05 meters forward and 3.303 meters aft. (ans Fwd 2.95 m, Aft 3.20m)

151. The boat has a displacement of 2735 tonnes. Calculate the Cb if her length is 77.20 m, width of 16 m, draft of 3 m when she float on salt water. (ans 0.72)

155. If the ship was ship side at the pier and a certain cargo is to be loaded on the cargo hold. What will the formula for bodily sinkage of the ship. (ans W / TPC)

156. The cargo ship was arrive from Cebu and needs to unload a certain cargo load. What will be the formula for bodily rise of the ship. (ans W / TPC)

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161. A ship has a draft of 3.95 m Forward and 4.40 m Aft, her center of floatation is on the midship. A weight is shifted so that her trim changes by 0.38 m. What are the new draft Forward and Aft.

(ans HULL)

164. A center-line strength member running fore and aft along the bottom of a ship an often referred to as the back bone. (ans KEEL)

(ans PLIMSOLL MARK)

168. An artificial wall or bank, usually of stone, made toward the sea or at the side of harbor or river for convenience in loading and unloading vessels. (ans QUAY)

172. What will be the change of trim if a weight of 90 tonnes is shifted Aft for a distance of 100 m in a ship which has MCT 1cm of 180 tons-meter. (ans 50cm)

173. Find the new drafts Fore and Aft if the ship has a length of 150m and a Moment Change of Trim of 50cm. Her center of floatation is 2m Aft of amidship and the original draft were 6m Fore and 6.10m Aft, (ans F 5.74m, A 6.34m)

177. Calculate the new draft if the vessel original draft forward is 7.10m and aft is 7.25m with the length of 140 m long and a weight was loaded on the forward section of the vessel. It has a bodily sinkage of 5 cm, a change of trim of 15.83 cm, and the center of floatation is 3m Aft of amidship. (ans F 7.23m, A 7.20m)

178. The ship is 140 m long, her TPC is 20, and the MCT1cm is 135 tonnes-meter, the center of floatation is 3 m Aft of amidship. Where must the cargo be placed in order to maintain the draft of 7m Aft. Find the distance of load cargo forward and Aft in reference of center of floatation.

182. Find the permeability of a cargo which has a relative density of 1.80 and stowage factor of 1.20. (ans 53.70%)

183. A box shaped lighter is 50m long, 8 m wide and floats at a mean draft of 2m. Find the bodily sinkage if an empty compartment amidship, 20m long is bilged. (ans 1.33 m)

189. A ship of 2500 tons displacement has a Kg of 4.50 m. Find the desired height of Kg if the existing G is to be lowered by by 33 cm. (ans 4.17 m)

190. A ship displaced 2500 tons whit a Kg of 4.50 m. Find how many tons of cargo had to be loaded on the twin deck whose Kg is 3 m and if the existing G is to be lowered by 33 cm the desired height of Kg was of 4.17 m. (ans 700 or 705 tons)

(ans 6 m)

193. The ship had an inclining experiment and her GM is found to be 1.90 m, her displacement in salt water is 3200 tonnes. Find ship the volume of displacement? (ans 3122 cu meters)

197. A box shaped vessel had a 60m long, 10 m wide and floats at a draft of 3 m. Find the vertical center of buoyancy (KB)? (ans 1.5 m)

198. A barge of rectangular shape with 60m long, 10 m wide and she floats at a draft of 3m, with a BM of 2.78m and a KB of 1.5 m. Find the metacentric height (KM) of the barge? (ans 4.28 m)

202. A deep tank which has a rectangular free surface of 20 meters long and 18 m wide. Find the free surface of the deep tank? (ans 9720 m4)

203. If the barge has deep tank with a rectangular free surface of 20 meters long and 18 m wide and had a free surface of 9720 m4 and a volume of displacement of 5902 cu m. Find the rise of G due to free surface? (ans 1.65 m)

207. Find the change of trim and the new drafts in a ship of 125 m length when a weight of 100 tons is shifted Aft for a distance of 60 m. (ans 50 cm)

208. Find the change of draft of Forward and Aft if the center of floatation is 65 m and 60 m respectively. If the change of trim is 50 cm. (ans F 0.26m A 0.24m)

214. Find the density of a fuel oil whose relative density is 0.92. (ans 920 kg/m3)

215. When a double bottom tank is full of fresh water it hold 120 tonnes. Find how many tonnes of oil of relative density 0.84 it will hold. (ans 100.8 tonnes)

220. What will be the (KB) vertical center of gravity of a rectangular midship section of the barge if she is in a draft of 3 m. (ans 1.5 m)

221. A box shaped vessel is 24 m x 5 m x 5 m and floats on an even keel at 2m draft. Calculate the transverse metacenter height (BMT). (ans 1.04m)

222. A ship arrived in the pier and had to load the following cargo: 1000 tonnes x KG 2.5m
500 tonnes x KG 3.5 m
750 tonnes KG 9.0 m
Find the final KG of the cargo. (ans 4.89 m)

2250

1250

225. A ship of 5000 tonnes displacement has KG 4.5 m and KM 5.3 m. The following cargo is loaded: 2000 tonnes KG 3.70 m and 1000 tonnes KG 7.50 m. Find the final GM of the ship
(ans 0.625 m)

226. A ship of 5000 tonnes displacement has KG 4.5 m and KM 5.3 m. A cargo was been loaded and resulting new ship displacement of 8000 tonnes and KG of 4.675 m. Find how much of cargo