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Mech Theory 3 > Environmental, bilge and sullage > Flashcards

Environmental, bilge and sullage Flashcards

1
Q

What is IMO?

A

International Maritime Organisation

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2
Q

What is MARPOL?

A

Maritime Pollution Regulations

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3
Q

What is the requirements of a ship with regards to oil discharge when within 12nm of the coast?

A

the oil content in the discharged water must not exceed 15ppm
The ship is underway with an oil content in the effluent under 15ppm
The ship has in operation an oily water separating filter with an oil discharge monitoring and control system

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4
Q

State 6 special areas as defined by IMO.

A 
Baltic Sea
North West European Waters (including; North Sea, Irish Sea, Celtic Sea, English Channel, part of the North East Atlantic)
Mediterranean Sea
Black Sea
Gulf
Gulf of Aden
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5
Q

State four main sources of contamination from a ship.

A

Bilges
Fuel Systems
Oil Systems
CPP Systems (Controllable Pitch Propeller)

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6
Q

If a MARPOL incident occurs who is informed at sea/in harbour?

A

MEOOD/MEOOW

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7
Q

How can oil leakages into the bilge be minimised?

A

Keep machinery spotless – easier to identify leaks
Monitor Lube Oil ready use tanks and investigate any losses
No surfactants (Chemicals) to be used (“Kleen Break” only (Wet wipes))
AFFF only in real fire risk situations
Eductors to be manned when in operation
Maximise the use of shoreside facilities when alongside

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8
Q

What is Black Water?

A

Black water is the water and biological waste that comes from the ship

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9
Q

What is Grey Water?

A

Grey water is water waste that comes from Bathroom sinks, Galleys, Dishwashers, Laundries and Sinks

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10
Q

What is the regulations with regards to Black Water discharge at
• 0-4 nm
Within 4NM discharge is only permitted with an IMO approved Sewage Treatment Plant (STP)

A

Within 4NM discharge is only permitted with an IMO approved Sewage Treatment Plant (STP)

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11
Q

What is the regulations with regards to Black Water discharge at
• 4-12nm

A

Between 4NM and 12NM discharge is only permitted if an IMO approved system to Comminute and disinfect the sewage is in operation

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12
Q

What is the regulations with regards to Black Water discharge at

• 12nm+

A

Over 12NM from shore no treatment is necessary

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13
Q

What is the VPS and what will it consist of?

A

The Vacuum Pumping System (VPS) comprises of a “fitted for ship” set of diesel or electric driven pumps, manifolds and hoses, which all black and grey water discharges can be collected and pumped to the available shore facility

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14
Q

Why is it important to keep bilges empty?

A

The bilges are best kept empty as not to cause unneeded rocking in the ship that could cause an imbalance

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15
Q

What is the Bilge?

A

The bilge is a tank at the bottom of the ship to contain leaks of oil from machines

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16
Q

What methods are available to empty the bilge?

A

Bilge system, Sullage system and Eductors

17
Q

What is the bilge system?

A

The bilge system is fitted to remove excess fluid from machinery space bilges to separate water from oil and discharge oil to sullage tanks by means of an oily water separator, with the water being discharged over board.

18
Q

What is the Sullage System?

A

The sullage system is designed to store dirty or waste oil/fuel until it can be properly discharged ashore. The discharge from the bilge system is directed to the tanks of the sullage system or overboard when it does not contain oil/fuel and complies with current MARPOL regulations.

19
Q

What are Eductors used for?

A

They’re used to remove quantities of fluid, generally oil/fuel/water, from the bilges very quickly. Excess liquid builds up in the bilges because of leaks, overflows and machinery discharges, and also because of scrubbing down and washing through.

20
Q

What principle does an Eductor use?

A

They use the Bernoulli’s theory and the Venturi effect.

21
Q

What is the correct order to operate an Eductor?

A
  1. Open the discharge over board valve
  2. Open the motive water valve supplied from the HPSWM
  3. Open the bilge suction valves
22
Q

What may happen if an Eductor is operated incorrectly?

A

If used wrong the compartment will be flooded with sea water from the HPSWS

23
Q

Whose permission is needed to operate an Eductor?

A

MEOOW/MEOOD

24
Q

What must the Eductor be when in operation?

A

It must always be monitored and never left alone while in use.

Mech Theory 3 (3 decks)

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