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Everything posted by chengkp75
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While there is a "central" HVAC system that is not controlled by the cabin thermostat, the thermostat does control the cabin recirculation AC. The key slot controls a "set back" thermostat that raises the set temperature 5 or 10 degrees when there is no card in the slot. The lights that stay powered with no card in the slot, are the emergency lights in the cabin.
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While not for RCI, part of my job was ADA compliance with NCL. There will be one and only one "relief station" on the ship, it will be used by any and all service dogs onboard. You are not allowed to leave the service animal unattended in the cabin for any time, and you won't be able to "hire" a crew member to watch him. Access on the pool deck is generally unlimited, but as you know, no entry into the pool. The "relief station" will be outside, in passenger areas.
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I think it will be a case of removing some bridge and then some containers and then some more bridge, and so on. It will require some hands-on rigging, but likely having one crane with a personnel basket and one crane to lift the container. The rigger will be harnessed to the basket, but will have to walk on the containers not only to connect the other crane's lines but to also unlock the fittings that hold the containers to each other.
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Dawn passengers left “stranded” on African island
chengkp75 replied to WonderMan3's topic in Norwegian Cruise Line
Thanks, yes. I've personally known of 3 US pilots being killed. -
Dawn passengers left “stranded” on African island
chengkp75 replied to WonderMan3's topic in Norwegian Cruise Line
The actual statistic is that pilots have a 1 in 20 chance of dying on the job. 2 to 3 pilots worldwide are killed on the job annually. Working from my phone, so not smart enough to provide the link, but it is from Business Insider, quoting a book by Christopher Mims, if you want to look it up. Try to remember that cruise ships make up about 5% of world shipping, so there are thousands, if not tens of thousands, of pilot boardings every day all around the world. The same article states that between 2007 and 2021 8 harbor pilots just in the US have died.- 737 replies
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Baltimore Tragedy: Collapse of Francis Scott Key Bridge
chengkp75 replied to Airbear232's topic in East Coast Departures
I think it's a SOLAS requirement. Though my internet is limited right now, and can't find the cite -
Baltimore Tragedy: Collapse of Francis Scott Key Bridge
chengkp75 replied to Airbear232's topic in East Coast Departures
Never seen a windlass that didn't have a manual brake handwheel even on a remote hydraulic brake. -
Longer stroke means a slower rotation of the crankshaft. The fixed piston rod, crosshead, and connecting rod removes the side loading that a "trunk" piston takes from the angularity of the connecting rod, so the piston does not need a long "skirt" (the part of the piston below the wrist pin) to keep it aligned with the cylinder. A smaller bore also better ensures complete combustion across the piston face, even when the engine uses two fuel injectors.
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That is a two stroke, medium speed, trunk piston engine, like nearly every cruise ship has, and that Dali has for generators. The main engine is a "slow speed" "crosshead" 2 stroke engine as per this: Sorry, didn't watch the video all the way through to see it covers crosshead engines. Also, all the "roots blower" (or engine driven blower) does not apply, as all are turbocharged. Note in the drawing above, that each yellow platform on the side is a full story high.
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Longshoreman's Union responsibilities
chengkp75 replied to bob brown's topic in Ask a Cruise Question
Yes, the ILA handles the mooring lines as well. Members sign up for what types of work they want to do, whether cargo handling, cruise ships, or ling gangs. I believe it's every month that they can change what they want as their assignments. Line gangs for any ship are 6 men, plus any in boats that may be needed to handle lines that go to dolphins or are very long over water. Most cargo ships are lucky if 3 of the 6 show up to actually work, but you pay for the whole gang. -
This is why marine diesel engines are built with separate, replaceable cylinder liners, not uni-block construction. Slow speed engines typically have piston overhaul periods of about 12,000 running hours, but liners last around 48,000 hours. Medium speed engines, also with separate liners, tend to be completely overhauled every 12,000 hours. The largest slow speed diesel engine produces 80Mw of power, or 70% more energy than Oasis of the Seas 6 engines combined. The engine weighs 2300 tons, is 44 feet tall, and 90 feet long. Each piston is 37" in diameter. The engine produces 107,000 horsepower using 3/4 of a gallon of fuel per revolution, and when turning at top speed (102 rpm), that is 72 gallons/minute.
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Dutch Tulip Bulbs-can we take on board?
chengkp75 replied to elmac40's topic in Holland America Line
Here is the Dept of Agriculture rules on plants imported to the US: https://www.aphis.usda.gov/aphis/resources/traveler/intl-travel/plants-seeds/plants-seeds notice that you are only allowed 12 bulbs unless you apply for an import license. -
Every marine diesel engine is turbocharged, whether 2 stroke or 4 stroke, direct coupled slow speed, or medium speed generator. Some engines will also use exhaust gas heat to boil water in an "exhaust gas boiler", and this steam then drives a turbo-generator, which can generate electricity equal to about 10% of the rated output of the engine. Waste heat from the cooling water system is also used to boil sea water in flash evaporators to produce fresh water, as well as heating domestic hot water. This type of plant provides the highest thermal efficiency of any power plant.