08 ноября 2018
CAMO, TAM и ASOG
Евгений Богаченко
0
6770
Тема CAMO,
TAM и
ASOG с
одной стороны проста, а с другой стороны вызывает путаницу.
Зачем нам столько табличек для DP операций и
что с ними делать? Так совпало, что тем, кто работают в АРАМКО, пригрозили проверкой
компетенции DP оператора как раз по этим темам. О CAMO, TAM и ASOG можно прочитать в циркуляре IMCA M220.
Для всех коллег, кто читал, но не может воедино собрать мысли,
или кто хочет иметь быструю напоминалку, выкладываю текст ниже. Сразу на
английском.
Critical Activity
Mode of Operation (CAMO)
This is a
tabulated presentation to configure the DP system, power generation and
distribution, thrusters and position reference systems so that the DP system as
a whole is fault tolerant and fault resistant. CAMO sets out the required
equipment configurations and operational standards to meet its maximum level of
redundancy, functionality and operation so that no single failure will exceed
worst-case failures. CAMO configuration should be prepared from the DP FMEA and
the vessel’s operational characteristics. The term Safest Mode of Operation (SMO)
has been used previously to describe CAMO. CAMO covers green and
blue (advisory) conditions and the following items:
- Generators
set up, open or closed bus-tie, power management, 100% output test and UPSs.
- Thrusters
and 100% output test.
- Manual
controls and IJS.
- DP
control system, consequence analysis, mode availability and selection.
- PRSs and
sensors, testing and selection, placement of targets.
- Fuel/sea
water/compressed air system, their redundancy, isolations and crossovers.
- DP station
and ER manning, including watchkeeping rotation and competency of watchkeepers.
- Trials
and checklists.
Task
Appropriate Mode (TAM)
This
configuration accepts that a failure could result in effects exceeding the
worst-case failure, such as blackout or loss of position and/or heading. TAMmay be appropriate in situations where the consequences of a loss of position
are low and will not result in damage to people, the environment or equipment. A
typical situation for TAM is when time to safe termination is short and the
vessel is outside 500m safety zone, as against CAMO when time to safe
termination is long and operation is within the 500m safety zone. TAM is
developed after documented risk assessments have been carried out. Typical
items considered in TAM are the same as in CAMO.
Activity
Specific Operating Guidelines (ASOG)
ASOGdiffers from CAMO and TAM in that it relates to a known location and activity.
ASOG is developed by considering the operational, environmental and equipment
performance limits for the DP vessel in relation to the specific location. Where
a decision has been made to operate in TAM, a separate ASOG covering TAM should
be produced. The ASOG performs the same function as Well Specific Operating
Guidelines (WSOG) for drilling vessel.
ASOG covers
green, blue (advisory), yellow and red conditions and the following items:
- Weather
and environmental conditions, positioning performance and excursions.
- Drive-off
and drift-off scenarios.
- Diesel
generators and loads minimum required for the activity, performance limits and
failures.
- Thrusters
and loads minimum required for the activity, performance limits and failures.
- Battery
and UPS systems and failures.
- Fuel/sea
water/compressed air systems, performance limits and failures.
- DP
control system, Operator’s Station, DP networks, including operation and
redundancy, failures.
- PRSs and
sensors, number of enabled systems and performance, failures.
- Critical
communications, performance and failures.
-
Non-essential DP systems, including ventilation and a/c – performance and
failures.
- Fire,
flood, visibility, collision, including threat to safety of the DP operation.
-
Simultaneous operations (SIMOPS), including communications with assets.
С уважением
Евгений Богаченко
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