XBGuy Posted September 28, 2017 #1 Share Posted September 28, 2017 Our cabin of choice is, typically, on the highest deck as far forward as possible. One of the fun things about this location is that you can see some of the bridge activities. We just enjoyed a 10-day Alaska cruise on the Grand Princess--in one of our favored cabins. Late in the afternoon of our Ketchican port stop I was sitting on our balcony when I spotted a line being dropped from the bridge down to the water. At the end of the line was a metal cylinder which from my view appeared to be about 10 inches (25 cm) long and about and inch and a half (3-4 cm) in diameter. A few seconds later the line with the cylinder was pulled up. The sun screens on the bridge were pulled down. So, I could not see what activity was takiing place. However, the next day, while we were visiting Juneau, I happened to again be sitting on the balcony when I saw the cylinder being dropped. This time, though, the sun screens were not pulled down. So, I was able to get something of a view of what was going on. The sailor who dropped the cylinder in and then retrieved it put what appeared to be a calibrated tube into the top of the cylinder. It was obveious that the top was open, and, so, I assumed that he had dropped the cylinder to get a sample of water. He examined the tube and noted something in a log. He removed the tube and dumped the water from the cylinder out the bridge window. Obviously, something is being measured. What was it? Temperature? Specific Gravity? Salinity? Something else? How is this information used? Expiring minds want to know Link to comment Share on other sites More sharing options...
easyboy Posted September 28, 2017 #2 Share Posted September 28, 2017 That's interesting to know! Sent from my iPhone using Forums Link to comment Share on other sites More sharing options...
Kamloops50 Posted September 29, 2017 #3 Share Posted September 29, 2017 Probably temps and specific gravity (also indicates salinity) Link to comment Share on other sites More sharing options...
CPT Trips Posted September 29, 2017 #4 Share Posted September 29, 2017 Pollutants from the ship? Link to comment Share on other sites More sharing options...
Rare LHT28 Posted September 29, 2017 #5 Share Posted September 29, 2017 maybe checking water quality to see if they can run it through their osmosis system or need to clean the filters more often due to more particulate in the water Just guessing Link to comment Share on other sites More sharing options...
Rare Keith1010 Posted September 29, 2017 #6 Share Posted September 29, 2017 I would love to hear the answer as well. Keith Link to comment Share on other sites More sharing options...
Krazy Kruizers Posted September 29, 2017 #7 Share Posted September 29, 2017 I am also curious as to what they actually were testing the water for. Link to comment Share on other sites More sharing options...
Rare sparks1093 Posted September 29, 2017 #8 Share Posted September 29, 2017 Hopefully Chengkp75 will come along and shed some light on this. Link to comment Share on other sites More sharing options...
gooch47 Posted September 29, 2017 #9 Share Posted September 29, 2017 Strange that they would do it from the bridge. Wouldn't it be easier from a lower deck? Link to comment Share on other sites More sharing options...
TheOldBear Posted September 29, 2017 #10 Share Posted September 29, 2017 Strange that they would do it from the bridge. Wouldn't it be easier from a lower deck? The bridge wings are wider than the ship - likely nothing else does, and they don't want the sample dragged along or bouncing off the hull. Link to comment Share on other sites More sharing options...
XBGuy Posted September 29, 2017 Author #11 Share Posted September 29, 2017 Strange that they would do it from the bridge. Wouldn't it be easier from a lower deck? I thought the same thing. If I was assigned to do it, there is a better than even chance that I'd spill salt water on some critically important console. Link to comment Share on other sites More sharing options...
XBGuy Posted September 29, 2017 Author #12 Share Posted September 29, 2017 The bridge wings are wider than the ship - likely nothing else does, and they don't want the sample dragged along or bouncing off the hull. I suppose there is some sense, there. Link to comment Share on other sites More sharing options...
bob brown Posted September 30, 2017 #13 Share Posted September 30, 2017 And isn't it 'forbidden', to dump anything overboard...even water obtained from there? Just curious... Link to comment Share on other sites More sharing options...
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