SEA TRIAL Procedure (Rev1)

Institute of Marine Engineering, Science and Technology (ImarEst) Prepared by Hari Prastowo - Ju rusan Teknik Sist em Perkapalan Perkapalan ITS Tanggal 14 -feb-13 Date Hal 1 of 9 Page

WORKING INSTRUCTION

SEA TRIAL PROCEDURE

No. Revisi Rev. Number

I. TESTS AND SEA TRIAL TRIAL CONDITION 1. KINDS OF TEST: a. Starting Test b. Stop Inertia Test c. Progressive speed trials d. Crash Stop astern and Crash stop ahead test. e. Turning test f. Zigzag Maneuvering test g. Steering Gear test h. Anchoring test i. Black Out j. Endurance Test Test k. Noise and Local Vibration l. Fire Fighting Equipment test (additional) m. Life Saving Appliances Test (additional) 2. SEA TRIAL CONDITION a. Ballast Condition. The vessel is to be ballasted to the full displacement corresponding to the …. Meter (mld) draught in sea water. b. Draft Measurement. Prior to sea trial, ship’s drafts (fore, mid ships (p & s), and aft) shall be measured at the draft marks by eye in the presence of owner’s representative. Items to measure are: i. Draft reading at fore, aft, and sb & ps mid ship. ii. Specific gravity of sea water c. Life saving appliances check. In order to ensure the safety for all persons on board, thorough checks shall be carried out to the life saving appliances prior to sea trial.

II. TEST ITEMS FOR THE SEA TRIAL 1. STARTING TEST a. Procedure: Starting test to be carried out as per Class Rules for starting system of the main engine. For reversible engine, engine, the staring system shall capable for 12 times start, whereas for non-reversible engine for 6 times. For electric starter, the starting system is to be confirmed to start as engine manufacturer guidance. b.

Items of Measurement: i. Total number of starting. ii. Functional test confirmation.

01

Institute of Marine Engineering, Science and Technology (ImarEst) Prepared by Hari Prastowo - Ju rusan Teknik Sist em Perkapalan ITS Tanggal 14 -feb-13 Date Hal 2 of 9 Page

WORKING INSTRUCTION

SEA TRIAL PROCEDURE


. 2. MAGNETIC COMPASS ADJUSTMENT The adjustment of magnetic compass shall be carried out prior to sea trial according to standard from technical engineer and certified on behalf of the government. 3. STOP INERTIA TEST a. Purpose: To measure required time and distance from the time that ME (full throttle position) to be stopped up to the vessel’s speed reaching to two (2) knots. b. Procedure: While the vessel is running ahead at MCR (100% engine load, or 100% Rpm), the main engine to be stopped until the vessel reach tw o (2) knots speed c. Item to be Measured: i. Vessel’s speed before the main engine to be stopped (at full-throttle or at 100% load or at 100% rpm). ii. Time required until vessel speed reaching 2 knots after main engine to be stopped. iii. Advance distance from full speed to 2 knots speed (at stopped main engine condition). iv. Wind speed, wind direction, and sea condition. 4. PROGRESSIVE SPEED TRIALS a. Purpose: The test to be carried out with the engine load progressively increased in order to settle the relation between vessel’s speed and engine loads. b. Place: On the availably safe sea area. c. Procedure: Progressive speed trials are to be carried out at the following engine load: Engine Load Engine Power Engine Rpm Run between Mile posts 25 % As calculation As on panel One double run 50 % As calculation As on panel One double run 75 % As calculation As on panel One double run 100 % As calculation As on panel One double run *) The measurement may differ subject to Maker and Class recommendation d.

Items of Measurement: i. Vessel’s speed ii. Main Engine parameters; Rpm, Throttle position, and other necessary items for Main Engine performance. iii. Weather, sea state condition, relative velocity, direction of wind, and depth of sea.

5. CRASH STOP AHEAD and CRASH STOP ASTERN: a. Purpose; To prove that the Main Engine is suitable for ship’s emergency stop, and to measure the time and distance between points of the order of astern / ahead under headway until Rpm becomes steady.

01


b.

WORKING INSTRUCTION

SEA TRIAL PROCEDURE


Procedure: i. Stop Astern Test: While the vessel is running ahead at 100 % Main Engine load (corresponding to its MCR) the Main Engine is then ordered to reverse its RPM from initial rpm until the RPM is reaching steady. ii. Handling the Main Engine for Stop Astern Test: Procedure of the test is according to the followings:

No

Command

Speed Contro l handle

1

Start ahead

100 % load

2

Order to start the Stop Astern Test

For Conventional Shafting: Stop the ME, change to the reversed Rpm, start the engine, increase rpm progressively to the MCR.

3

Stop test

For Steerable Rudder Propeller: Move the SRP handle from 0 o gradually up to reaching 180 o For Conventional Shafting: Stop the ME, change the rpm to the initial Rpm,

Rpm Control Dial for ME To reach steadily at MCR rpm ahead To reach reversed rpm steadily at MCR astern (referring to the Engine Maker)

Until 0 rpm

For Steerable Rudder Propeller (SRP): Move the SRP handle from 0 o gradually up to reaching 180 c.

Items to measure: i. Measurement on Stop Astern Test: Vessel’s speed each 10 second interval by Speed Log on the wheel house. Vessel’s heading angle each 10 second interval by Gyro compass. ME rpm each 10 second interval correspondingly. Wind direction and velocity, weather state, and sea depth at the beginning of the test. Time elapsed from signal “full-astern” to the complete stop, i.e. from the Main engine to be stopped engine begins to rotate astern up to the vessel is completely stopped. 

  



→

ii.

Measurement on Stop Ahead Test:

→

01

Institute of Marine Engineering, Science and Technology (ImarEst) Prepared by Hari Prastowo - Ju rusan Teknik Sist em Perkapalan ITS Tanggal 14 -feb-13 Date Hal 4 of 9 Page 

  



WORKING INSTRUCTION

SEA TRIAL PROCEDURE


Vessel’s speed each 10 second interval by Speed Log on the wheel house. Vessel’s heading angle each 10 second interval by Gyro compass. ME rpm each 10 second interval correspondingly. Wind direction and velocity, weather state, and sea depth at the beginning of the test. Time elapsed from signal “full-ahead” to the complete stop, i.e. from the Main engine to be stopped engine begins to rotate ahead up to the vessel is completely stopped. →

→

6. TURNING TEST a. Purpose: To examine the vessel’s turning maneuverability, maximum advance, and maximum tactical diameter of turning. b. Procedure: Turning test shall be measured at 100% Main engine Load (full-throttle) then the steering rudder to be moved maximum (as per design) to the starboard and portside, and the position to be kept until the vessel reach the turning of 360 O from the original course. c. Items to measure: i. Vessel’s speed each 10 second interval by speed log ii. Vessel’s heading angle each 10 second interval by gyro compass iii. Shaft rpm each 10 second interval accordingly iv. Wind direction and velocity, weather state, and sea depth at the beginning of the test. v. Tactical diameter and advanced diameter. 7. Z-MANEUVERING TEST (ZIG-ZAG TEST) a. Purpose: To examine the ship’s course stability and how the ship responds to the changes of rudder angle. b. Procedure: Having the vessel initially in full-ahead-speed on 100% MCR, the Zigzag test is to be carried out, as follows: i. Direct the vessel to the heading 20O starboard. ii. When the heading of the vessel has been reaching 20 O to the starboard from the initial course, portside the helm 20 O . iii. When the heading of the vessel has been reaching 20 O to the portside from the initial course, starboard the helm 20 O . iv. Repeatedly, carry out the step no ii. v. When the vessel’s heading return to initial course, the test is finished. c. Items to measure: i. Vessel’s speed each interval 10 second by means of speed log.

01


ii. iii. iv. v. vi.

WORKING INSTRUCTION

SEA TRIAL PROCEDURE


Vessel heading angle of each swing by means of gyrocompass. Maximum heading angle of each swing by means of gyrocompass. Shaft rpm each 10 second respectively. Wind direction and velocity, sea state, and sea depth at the beginning of the test. Required time for each change and holding of rudder angle (start and stop of the actual rudder motion against the response of the actual vessel motion)

8. STEERING GEAR TEST a. Purpose: To examine the capability of the steering gear system and the redundant system of the steering gear. b. Procedure: i. Simulation test for redundancy arrangement to be carried out to verify that, upon any single failure, the propulsion and steering system remain in operational, or the back-up propulsion and steering system shall be speedily brought into service. ii. For emergency steering gear test, the propulsion and steering system must be able to be operated by local system or local panel in the steering gear room. c. Test Items: i. Functional test of each back-up system of the steering gear system by means of local control in the steering gear room. ii. Wind direction and velocity, sea state, and sea depth at the beginning and the end of the test. 9. ANCHORING TEST. a. Purpose: To examine the performance of Windlass. b. Place and Condition: i. The vessel is to be brought to a standstill condition and headed into the wind before commencing the test,. ii. The test is to be done in the deep water area where sufficient for 3 shackle of anchor chains. c. Kind of Tests i. Loading Test: The windlass shall be functionally tested by hoisting up 55 mm (2 fathoms) of chains from the state in which 82.5 (3 fathoms) of anchor chains are submerged and freely suspended at commencing of lifting. ii. Chain Drum Brake Test: The chain drum brake shall be tested with the anchor dropping at every approximately ½ fathoms of chains to confirm safe paying out and holding of the anchor chains by means of braking the chain drum. d. Procedure:

01


i.

ii. iii.

iv. v.

WORKING INSTRUCTION

SEA TRIAL PROCEDURE


Drop the starboard anchor by releasing the brake of the windlass, and approximately 82.5 m (3 fathoms) of starboard anchor chains shall be run into water. While dropping in progress, the anchor brake shall be tested. Hoist 55m (2 fathoms) of starboard anchor chains by means of windlass. Drop the portside anchor by releasing the brake of the windlass, and approximately 55 m (2 fathoms) of portside anchor chains shall be run into water. While dropping in progress, the anchor brake shall be tested. Hoist 27.5 m (1 fathoms) of portside anchor chains by means of windlass. Hoist 27.5 m (1 fathoms) of both sides anchor chains and anchors.

e. Items of Measurement: i. Weather, wind velocity and direction, and water depth. ii. Hoisting speed (required time for hoisting 1 fathoms). 10. BLA CK-OUT TEST a. Purpose: This test is to be done during the sea trial, to ensure the safety of the vessel upon the loss of electric power for automatic starting and connecting Main Switch Board of the Standby Generator. b. Items of measurement: Required time to start and to connect Main Switch Board of the st andby generator after loss of the electrical power supply.

11. ENDURANCE TRIAL a. Purpose: To examine the Main Engine endurance performance in continuous operation of Service Continuous Rating, and to measure performance of the Main Engine in terms of Power, RPM, Fuel Consumption, and durability. b. Procedure: Endurance trial shall be carried out for at least six (6) hours continuous operation at NCR (85% MCR). During the endurance trial, Fuel Consumption of Main Engine shall be measured for operational reference. c. Items of measurement: i. Fuel Oil consumption by means of flow meter. ii. Shaft revolutions. iii. ME rpm iv. Main Engine load / power v. Other necessary data regarding Main Engine performance such as: Cooling temperature (in & out) and flow rate LO temperature (in & out) LO pressure Exhaust gas temperature Air and ambient temperature in Engine room etc      

01


WORKING INSTRUCTION

SEA TRIAL PROCEDURE


12. NOISE AND LOCAL VIBRATION TEST. 12.1. NOISE TEST a. General: During official sea trial, measurements of noise levels is to be done in all spaces of private cabins on Accommodation Decks, Wheelhouse, and Machinery Spaces. Noise levels are to be recorded and submitted to the ship owner and other parties concerned. One copy of the record shall remain onboard. b. Conditions of Measurement: The noise is to be measured under following conditions: i. Main propulsion machinery shall be run at Normal Continuous Rating. ii. Other auxiliary machineries, navigation instruments, etc, shall be operated throughout the measurement period as required for normal seagoing condition during sea trial. iii. Mechanical ventilation and air condition equipment shall be in normal operation, taking into account that the capacity is in accordance to the design conditions. iv. All doors and windows of rooms are to be closed. v. Spaces shall be furnished with all necessary equipment. Measurement without soft furnishings may be made, but no allowance shall be made for their absence. vi. The depth of water under the vessel’s keel and the presence of large reflecting surfaces in the ship’s vicinity may affect the readings obtained, and shall be, therefore, be noted in noise survey report. vii. The meteorological conditions such as wind and rain, as well as sea state, shall be such that they do not influence the measurement. c. Measurement procedure: i. During the noise level measurements, only those of concerned in ship operation and noise measurement are allowed to present in the measured spaces. ii. The sound level meter shall be calibrated with the calibrator before and after measurements. The batteries shall also be checked immediately before each period of use. iii. Readings of sound pressure level shall be taken in decibels using an A-weighting filter: dB(A). iv. The meter shall be set to slow response and the readings made only to the nearest decibel. A measuring time of at least 5 seconds shall be allowed. If a meter fluctuate in level within a range of no more than 5 dB(A) maximum to minimum, an estimation of the level shall be made by averaging with eye. v. If the range fluctuations are in excess of 5 dB(A) or the sound is cyclic, irregular or intermittent in operation, an integrating meter shall be used set to A-weighting. Integration shall be made over a period of at least 30 seconds. vi. At positions of high noise, spot checks shall be performed with the meter set to “fast” response if considered necessary, to ensure the safety of a person taking measurement. d. Measurement Positions: The measurements are to be taken on deck in the center of the room. Measurements shall be taken at positions as follows: i. Engine Room:

01


ii.

iii.

iv.

v.

WORKING INSTRUCTION

SEA TRIAL PROCEDURE


Measurement shall be taken at four (4) representative positions per each deck level in engine room to upper deck. Pump Room: Measurement shall be taken at four (4) representative positions per each deck level in pump room. Navigation Spaces: Measurement shall be taken with all auxiliary equipment such as radar, echo sounder, window wiper, clear view screen, etc in operation. However, audible signals, telephone or similar need not to be taken into c onsideration. Accomm odation Spaces: Generally, one measurement shall be made in the middle such as cabins, hospital, office, mess room and recreation room. Service Spaces: The service spaces such as galley, pantry, and laundry, are to be measured. However, the measurement may be done without equipments in operations.

12.2. LOCAL VIBRATION TEST a. General: This procedure describes the measurement of vibration response of accommodations spaces. The purpose of measurement is to find out the vibration level and to investigate the dynamic characteristic of the ship. b. Procedure: i. Measuring acceleration and vibration frequency at the direction of transversal and vertical at the priority points A, B, and C, which measured at each rpm of the Main Engine. The objective is to find the Resonance Frequency Point. ii. Measuring acceleration and vibration frequency at the direction of transversal and vertical at points of accommodations and engine room. Measurement is to be carried out at NCR. iii. Velocity of vibration shall be measured with a portable Vibration-meter. The measurement shall be carried out not in simultaneous way but one by one. 13. FIRE FIGHTING EQUIPMENT TEST a. Purpose: This test is to be performed during sea trial, to ensure the Fire Fighting Equipment can be well operated. b. Items of Measur ement: All fire fighting equipment shall be functionally tested, including: Fire main hydrants on decks and accommodation deck Some portable fire extinguishers. Fire alarms and fire detectors in all rooms Emergency fire pumps.    

14. LIFE SAVING EQUIPMENT TEST a. Purpose: This test is to be performed during sea trial, to ensure the Live saving E quipment can be well operated. b. Items of Measur ement: Some of life saving equipment shall be functionally tested, including:

01

Institute of Marine Engineering, Science and Technology (ImarEst) Prepared by Hari Prastowo - Ju rusan Teknik Sist em Perkapalan ITS Tanggal 14 -feb-13 Date Hal 9 of 9 Page 







WORKING INSTRUCTION

SEA TRIAL PROCEDURE


Life boats: - Life boat is to be fully loaded in accordance to persons capacity. - Lowering davits in loaded condition by means of local handle inside the life boat. - Releasing life boat from davits by means of local handle. - Starting up onboard engine in the lifeboat. - Test of maneuvering of the life boat (turning and zigzag) - Rechecking provisions that required to be provided onboard. Life rafts: - Checking hydraulic release units and validating expire date. - If necessary, launching the life raft for simulation. Life buoys: - Check the number and availability on the approved on-board-location as per stated on the Safety Plan - Simulation of ‘man over board’ function. EPIRB and SART equipment: - Check expire date - Check battery power - Check transmitted signal on the navigation equipments.

01

SEA TRIAL Procedure (Rev1)

Recommend Documents