Hehehe.......
Your intelligence is astounding, maybe you should spend more
time here, I doubt you qualify for any diploma course.
So for the article below, the aircraft carrier has a 12 year
docking cycle, it means they dock the aircraft carrier for 12 years
each time. 
"To lower lifecycle costs, a twelve year docking cycle has been
specified for the CVN-78 and all subsequent aircraft
carriers. To meet such a stringent requirement, the
Composites Manufacturing Technology Center, working with Northrop
Grumman Newport News, the Applied Research Laboratory at Penn State
University, and the Carderock Division of the Naval Surface Warfare
Center, first identified the design factors that prevent the
current propulsion shaft covering from meeting that goal. The team
then developed and validated a new composite covering system, along
with an innovative application process, that provides more than
twelve years of reliable corrosion protection for Navy wet
shafting.
Lifecycle cost savings are estimated at $750,000 per
ship per 12 year cycle based upon eliminating a waterborne shaft
overhaul during this interval. Engineering change
activities are currently underway to incorporate the new covering
system into the shipyards’ manufacturing and repair procedures.
On average 469 shafts are now replaced or repaired every
7 years at a cost of $64,000 to $192,450 per shaft relative to the
shaft size. By eliminating one or two repair cycles for each shaft
and extending the frequency of each docking cycle, the total
estimated repair cost savings is $6M per year across the
fleet."
http://www.scra.org/composites.shtml
can u understand USN ''a twelve year docking cycle'' mean during
this cycle,
the ship will be done this and that.The ship will only spend
some times
in dock,not 12 years lah.US is better than Oz in ship
buildings.
For Oz,''docking'' clearly mean inside the dock lah.
For combatant ship,guns or missiles still can be fired even the
ship
inside the dock to defend your country.
For sub,it is very risky if u fire torpedos in dock.
MCD =
Mid-Cycle Docking--5''
Pl note ''docking'' ,not ''cycle''.My dear.
2.''The sea-days performance
of the submarines reached an
all-time high of 695 days (89%)''
Again ,u need to decode the meaning.
In the latest ASC annual report,2007 Annual
Report
PDF - 5.6MB
http://www.asc.com.au/aspx/about_us_annual_report.aspx
In Chairman reoport,he said
''The sea-days performance of the submarines reached
an
all-time high of 695
days''
This mean each sub ,on average,spent 116 days a year for
sea-days performance.
Then what does 89% mean?
In the page 3 to 5 Performance Summary chart,Sea Days chart,
Performance
Summary
u can read ''89% days achieved''
I think it mean the % of subs went to sea when it is out of docks!!
Not 89% of time in the whole year on sailing!!
''The sea-days performance of the submarines reached
an
all-time high of 695 days''clearly
indicate the total no.
of days that all the subs can sail---a good 695 days.
u have to read DOM reports what were their capabilty in this
period.
Collins Class Submarines
The third full year under the submarine
Through-Life Support (TLS) contract has
seen ASC complete the transition from the
submarine builder to the Commonwealth’s
trusted provider of TLS for the Collins Class.
ASC sees its open, alliance-style relationship
with the Commonwealth as providing a
platform for delivering better than ‘business
as usual’ performance.
During the year, ASC completed 11
maintenance availabilities, with all delivered
on time and on budget. The sea-days
performance of the submarines
reached an
all-time high of 695 days
(89%). This represents
a significant improvement and underscores
ASC’s effectiveness in delivering operational
outputs for the Royal Australian Navy (RAN).
bbb
