Hi from Nanhai
Hello all,
We are now drifting near to Nanhai fso awaiting the pilot some time this afternoon to take us in to begin loading. He will be arriving by helicopter. We left Hong Kong at 7pm last night by which time the visibility had improved. When we arrived it was down to just 1 mile which although it sounds a lot it looks and feels nothing when you are close to another ship. I was on the bridge for arrival and departure, I am beginning to understand how the ship handles now, it seems that it is important not to reduce speed too much because that slows down the reaction time when trying to avoid other vessels.
HK anchorage was eventful again just like last time with everyone arriving at once (lube oil barge, bunkers barge, provisions boat, garbage barge and the launch with the new joiners). So we worked all day and were there only 12 hours in the end. The barges all have Chinese crew who seem always to be in a hurry and so shout and toot horns to try and speed us along, we just ignore them and continue dealing with them one by one at a safe pace. The on signers are all aboard now and seem to be settling in. Some have sailed Chevron before but most are new to the company so will get quite a shock I'd imagine as other companies tend to be more relaxed (disinterested) in safety etc.
Just to add a little about the tank cleaning, the 5 inches of sludge I wrote of was only in one tank (the rest had 1-2cm in places). This was because the stripping valve was totally blocked with sludge. The cargoes the ship carries have high api (40 or so) and solidify towards the end of stripping as they cool down. The heating coils are mounted 5 1/2 inches above the tank bottom and so when the level falls below there it cools quickly as it is cooled by the ballast water being pumped in the u tanks beneath.
Right, off for some sleep now before the pilot arrives.
8 Comments:
Re-Sludge.
Sounds better than last report,
but I wonder - still something not right - blocked suction - maybe but I doubt it.
Bottom Washers working ?
(if fitted)
Ship Handling - yes you are right, they don't turn too well when stopped.(Use Power)
Tank Diving - When you get home go to Halfords and purchase yourself a small set of internal/external callipers plus a small steel rule.
Next time you find bolts missing etc. you'll be able to quickly measure up and get the guys up top to send replacements down straight away ( In a bucket with spanners)
That'll save you another "dive" tomorrow.
(Gas free today - maybe not tomorrow).
Keep it up - you're doing ok
Capt. (Ret'd)
Ha Ha Ha
There’s an odour of rhetoric creeping in here.
Blocked suctions eh !!
Well it is just possible I suppose, it does happen occasionally.
However it is far, far, more likely to have been something else.
Good cowing will blast “blocked suctions” clear in no time at all.
That’s what cowing does, redesolving as it goes.
Coils 5 + inches above the bottom of the tank was not the cause, but at least you took note of that fact for it is important.
Bad COW results:-
1. Think Machines – turning properly in both planes?
2. Were they actually turned on?
3. Were they programmed correctly? (if of the programmable variety)
4. Were they actually performing as programmed.
5. Think Heating - when was steam shut off in relation to COW Program.
6. Think Ballasting program in relation to COW program, was cold ballast water in double bottoms allowed to come into contact with tank top prior to completing cow for that tank. Always leave a bit of slack until cow program is completed – if you can - just 2 or 3 inches will do. Come to 100% in DB’s after completing cow in tank above – if you can.
7. Think – Stripping during bottom cowing – it must be done properly – that’s critical for a good result..
8. Think – cow pressure at time that tank was bottom washed.
9. Think also trim – at time of bottom washing.
10. Think also stripping suction valve – was it opening properly. Maybe the position indicator in CCR said it was, but that does not mean necessarily that it was open at the bottom of the tank. Remote indicators do not always tell the truth – some lie more than others – dependent on type.
11. Think also cargo temps on passage.
Better Cow results:-
The other tanks you mentioned, - well by comparison they were certainly a big improvement, but still leave something to be desired. Not good enough for a combination carrier – that’s for sure. Barely good enough for a modern tanker. Clearly a bit more effort, care and attention would have given a good result in the case of those tanks.
N.B. next time you go tank diving – don’t leave any rags behind you.
Remember you are dealing with experienced professionals in this blog.
“Blocked Suction” !!! – That excuse is even older than I am !!!
You are learning fast – much faster than at college alone. College is college, but ship is the university to you. - For the time being at any rate.
Good Blog.
BSS.
Wink. Wink.
LOL
Hong Kong, bunker barges and waterborne traders all blowing their horns, screaming and shouting etc. etc.
Nothing much changed there – at least not in the last 44 years.
I like that bit about Halfords – makes good sense to me.
A small thread gauge too – if you can get one – incredibly handy on a tanker.
Has anyone shown you how to measure a flange yet. You know what I mean -16 inch, 8 holes,
P.C.D. “XYZ” – about time you learned how to do that - don’t you think. Try it on a manifold blank next time you get the chance.
Great Blog – keep it up.
Shipmaster (Ret’d ) Jan 23rd 2007.
"Drifting off an FSO" - well that is at least "somewhat stress relieving" at this end, for reasons previously advised.Certainly better than "something" apparently similar, yet in reality, so very very different indeed, particularly especially in the region that you are operating in.
Blackdog.
wink.
For Rob:-
Aye Laddie this blog has value more than money can buy.
Where you young guys miss out is in the fact that you never had the opportunity to see for yourselves just what those cargo tanks could be like in the days before the introduction of COW and IG.
Sludge in those days could, after a few cargoes, build up to incredible depths, and I mean equivalent feet not inches.
Step off a ladder into that lot and it would swallow you up like quicksand – no kidding.
If you had seen that, then you would really come to realise just how important COW is – probably the greatest advancement in the carriage of crude oils since the beginning of time.
Do it properly always – it is so important.
You guys, in some respects, have never had it so good.
COW & IG – now that’s good technology – the very best in my view. (Tanker specific) – well worth “specialising” in.
“Pure Magic” – that’s a fact.
Ancient Mariner (Tankers + more)
Wink.
API 40 you said ?
Might not be a bad idea if you were to have a good look at ASTM Table 3 in addition to 6a & 11 as previously advised by some commentator or another.
Look at API 20 then API 40 and make your comparisons.
Which is Light and Which is Heavy ?
Control Systems Diagnosis: How much hydraulic oil is your vessel “consuming” per month.
Snifferdog.
(Australia Day 2007)
Is your vessel a perticipant in Ausrep, Reefrep, and Amver ?
Padre.
Cargo/Ballast Control Systems.
Subject:- Valves.
Fail Safes:- Do your cargo/ballast valves "Fail Safe". If so, in what position do they "Fail Safe".
Is it Open or Closed ?
pp.
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