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What is Aspect? Aspect of a target vessel is the relative bearing of the Own vessel from the Targetvessel. OR The angle between target vessel’s course and the theoretical line of sight.It is expressed as RED or GREEN In a WOA Triangle that we make for radar plotting WO is Way Own Own Ship’s Course…
A. Which stars will be within a certain hour angle of the observer’s meridian at a given time? 1. Find out the SHA of an imaginary star which is on the observer’s meridian. The SHA of a star onobserver’s meridian can be obtained by keeping LHA Star= 0° or 360° .2. Add and subtract the…
Deck Preparations The Master shall ensure that the following measures have been taken to prevent damage to Vessel, Machinery, Pipelines and Equipment prior entry into areas with Freezing Conditions. 1) Freeze prevention for Pipe lines and Valves / Systems related 2) Draining Fresh and Sea water Pipe lines, Valves, etc 3) Fire line, deck wash…
Read More “Oil Tanker operation : Measures For Freezing Conditions” »
Maximum outturn of a crude oil cargo at the discharge port can only be achieved by the correct implementation of a properly prepared crude oil washing (COW), plan. Each tanker which is fitted with a COW system must also have: 1.A crude oil washing operations and equipment manual and2.Personnel appropriately trained to assume overall charge…
Explain the basic properties of a free gyroscope Gyroscopic Inertia: Precession: With reference to marine gyro compass, briefly explain the following: Drifting Tilting Drifting & Tilting: How a free gyroscope is converted into a north seeking device Top Heavy Control Force Path traced by a North seeking gyro: Operating principle and care of gyro compass…
Explain the procedure for taking over watch in manned engine room Taking over a Watch: Ten important things that you will do / check when on a watch in the engine room. List the indicators and alarms provided with bridge control of M/E. E/R Watch Keeping: Indicators and Alarms on Bridge: Bridge instrumentation will vary…
Timing diagram of a two stroke diesel engines. Principle of operation of 2 stroke engine Description: Large 2 stroke diesel engine Crankshaft: Bedplate: Main Bearing Caps: Tie Rod: Crosshead Guides: Principle of operation of 2 stroke engine. Why is 2 stroke engines preferred for use as main propulsion engine? Principle: Operation / Stages Reason for…
Arrangements on stern tube lubricating system and the arrangements for mitigating the oil leakage into sea Purpose: Arrangement Adverse effects of the after-end seal leakage to the propeller shafting Differences between fixed pitch propeller and a controllable pitch propeller Aspect Fixed Pitch Propeller Variable Pitch Propeller Blade Angle Adjustment Blade angle is fixed and cannot…
Routine maintenance carried out on deck machineries Deck machinery includes the following: General Maintenance: Maintenance schedule for hydraulic systems General Maintenance: Maintenance schedule for Windlass / Mooring Winch. Maintenance schedule for Cranes Maintenance routine for prime mover of deck machineries Maintenance of hatch over. Working of an accumulator and its purpose in the hydraulic circuit…
Why is it necessary to treat the sewage generated on board? Reason for treatment of sewage: Treatment before pumping: Chemical Treatment Method (Disinfecting and communiting plant): Functioning of a biological sewage treatment plant Regulation for condition and discharging sewage overboard Discharge of sewage from ships other than passenger ships in all areas and discharge of…