Charles Parmele Profile picture
Jun 20 4 tweets 2 min read Twitter logo Read on Twitter
One possible reason, among a few, that #OceanGate submarine lost communications and hasn’t been located is something that messes with how sound travels through water, #thermoclines. They can act as blocks or conduits for sound. Caused by differences in water density.
Water density changes because of temperature and salinity, mainly. When a sound encounters these changes in density it can be reflected so something below it won’t be heard by something on top. They can also form a conduit where sound bounces between two layers.
When thermoclines act as a sound conduit they allow the sound to travel great distances and still be picked up. So a boat on the surface above a submarine may not hear it but a sonar miles and miles away may pick it up like it’s next door.
The same thing happens with radio signals in the atmosphere. This is why certain times of the day or during certain weather events you can pickup radio stations far away. For underwater searches this can make things a bit difficult but not impossible.

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More from @ceparmele

Jun 20
Imagine being trapped in something the size of a minivan. Imagine it is pitch black. The air is thick because you and 4 others have been breathing the same air for hours. You are trapped under 15,000 feet of water. It’s cold because there is no power. Condensation everywhere…
You can get up and move around because of the cramped space and even if you could it would just use more oxygen which you have a limited supply of on hand. No contact with the outside. Every now and again you hear the creaking of the hull caused by the tremendous pressure.
You have limited food and water. You have a head because the CO2 is building up. The CO2 scrubbers aren’t working as well as they should. It could be the humidity, the condensation that is cutting down the CO2 removal efficiency. The air reeks of BO and other stuff.
Read 9 tweets
Jun 20
#OceanGate missing submarine is a sad situation and I pray it works out and everyone is found safe. Here is the thing. The submarine is a joke. The ballast system requires shifting of people to jettison used pipes. Wtf? It is a tragedy waiting to happen. It isn’t a game.
I spent 11.5 years in the Navy and was sub qualified. Ocean Gate submarine is nothing more than a play toy for people with too much money and not enough commonsense ! Underwater, especially at the depths most military submarines operate isn’t a place to play…
Consider that Ocean Gate goes deeper than most military subs by quite a lot and it becomes even less of a place to play or be tourist. On Submarines the crew is qualified to operate the systems and trains constantly on what to do in case of emergencies. What about #OceanGate?
Read 11 tweets
Jun 19
#Racism doesn’t go away because laws are past. #Racism can only be defeated by education and people wanting to change. The #CivilRightsAct didn’t end racism, it just made it harder for people to discriminate against people based on #Race. It wasn’t a foolproof remedy…
#Hate and #Racism still exist but they are not as obvious as before, at least not for most people. #Racism is just evil and it likes to hide in the darkness. What does it do? It pools together until it becomes strong enough to be a threat. Like roaches breeding or rats.
Unfortunately, sometimes #Racism find dark recesses in our institutions and it grows. Law enforcement has been one and maybe it’s because there isn’t enough oversight because police like to police their own. So the few bad apples cause problems with deadly consequences…
Read 5 tweets

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