Murmester flashcards
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32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- Length between perpendiculars
- Distance measured between the fore perpendicular at the stem and the aft perpendicular, normally at the rudder stock. It differs from length overall and is used in load line and tonnage rules.
- Deadweight
- The weight a ship can carry, equal to displacement minus lightship. It includes cargo, bunkers, fresh water, ballast, stores, and crew effects, and is expressed in tonnes.
- Gross tonnage
- A dimensionless measure of enclosed volume under the 1969 Tonnage Convention, calculated as K1 multiplied by volume. It is used for fees and regulatory thresholds, not for weight or stability.
- Passenger ship definition
- A ship carrying more than twelve passengers on an international voyage. The threshold determines which SOLAS passenger ship requirements, including subdivision and life-saving rules, apply.
- Classification society role
- A private technical body that sets and verifies standards for hull, machinery, and equipment. It issues class certificates and may act as a recognised organisation for flag State statutory work.
- ISM Code applicability
- Applies to passenger ships and cargo ships of 500 gross tonnage and above on international voyages. The company receives a Document of Compliance; the ship receives a Safety Management Certificate.
- MARPOL Annex VI scope
- Covers air pollution from ships, including sulphur oxide and nitrogen oxide limits, ozone-depleting substances, and energy efficiency. It applies to all ships above 400 gross tonnage.
- STCW rest hours
- Minimum rest is ten hours in any 24-hour period and 77 hours in any seven-day period. Rest may be divided into no more than two periods, one at least six hours.
- Port State control
- Inspection of foreign ships in national ports against international conventions, conducted under regional memoranda of understanding. Serious deficiencies can lead to detention until rectified.
- International Ship Security Certificate
- Certificate issued under the ISPS Code confirming a ship meets security requirements. It is valid for up to five years, subject to intermediate and renewal verification.
- Freeboard
- Vertical distance from the freeboard deck to the assigned load line. Minimum freeboard depends on length, block coefficient, depth, superstructures, and sheer corrections.
- Fresh water allowance
- The amount a ship may be loaded deeper in fresh water, equal to displacement divided by four times the tonnes per centimetre immersion. It reflects the change in water density.
- Metacentric height GM
- Calculated as KM minus KG. Positive GM produces a righting moment and indicates initial transverse stability; the righting lever is GM times sine of the heel angle.
- Intact stability criteria
- Required GZ curve properties include at least 0.055 metre-radians of area to 30 degrees and 0.09 metre-radians to 40 degrees, with maximum GZ at 30 degrees or more.
- Collision bulkhead position
- Located between 0.05 and 0.08 of length from the forward perpendicular, or 0.05 of length plus three metres, whichever applies. It must be watertight up to the freeboard deck.
- Winter load line
- Marked below the summer load line by one forty-eighth of the summer draught. It applies in winter seasonal zones where increased wave loading requires greater freeboard.
- Emergency generator start time
- Must start automatically and supply the emergency switchboard within 45 seconds of loss of main power. It supplies emergency lighting, steering, radio, and fire pumps.
- Steering gear performance
- Steering gear must move the rudder from 35 degrees on one side to 30 degrees on the other in no more than 28 seconds at rated speed with one power unit.
- Unattended machinery space
- A class notation allowing periodic rather than continuous attendance. It requires type-tested alarms, safety trips, and periodic inspection of alarm and detection systems.
- Sulphur emission control area
- A designated sea area where fuel sulphur is limited to 0.10 percent, compared with the global 0.50 percent limit under MARPOL Annex VI. Scrubber equivalents may be accepted.
- Insulation resistance test
- Measurement taken with the circuit isolated to verify electrical insulation integrity. Class rules set the minimum acceptable value, commonly around one megohm for the installation.
- Emergency switchboard location
- Situated above the bulkhead deck and outside the main machinery space, so that a fire or flooding in the machinery space does not disable emergency power.
- Abandon-ship drill interval
- Each crew member must participate in at least one abandon-ship drill and one fire drill every month. Drills are recorded in the official logbook with details of participants.
- Immersion suit requirement
- Provided for every person on board where the ship operates in cold water, as defined by the LSA Code. It must allow the wearer to don it unassisted within two minutes.
- Fire control plan
- A permanently exhibited plan showing fire zones, appliances, and escape routes. A duplicate is kept in a marked container outside the deckhouse for shore firefighting use.
- Fixed CO2 system
- A total-flooding fire-extinguishing system for machinery and cargo spaces. It requires pre-discharge alarm, ventilation closure, and a release arrangement preventing accidental discharge.
- Lifebuoy distribution
- Number and placement are set by the LSA Code and ship type. At least half must carry self-igniting lights, and some carry smoke signals for man-overboard response.
- Annual survey window
- Conducted within three months before to three months after the certificate anniversary date. The anniversary date remains fixed on the certificate throughout its validity.
- Renewal survey timing
- Carried out within three months before certificate expiry. When completed early, the new certificate is dated from the completion of the renewal survey, not the old expiry.
- Continuous Synopsis Record
- A document recording the ship's ownership, flag, manager, and classification history. It must be updated within three months of any change and kept on board for inspection.
- Special survey cycle
- A five-yearly class survey including thickness measurement, tank testing, and examination of structure. It may be replaced by a continuous survey cycle spread over five years.
- Detainable deficiency
- A Port State control finding serious enough to prevent sailing, such as an inoperative fire pump, missing charts, or defective lifeboat launching gear, until rectified.