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Whenever there were divers down, the waterfront would get the announcement not to activate sonar. There are certain scheduled maintenance procedures which would involve activating sonar in-port, so the announcement was to ensure that we not do them until dive operations secured. This was for the...

It appears that "ivory-white" as a color is a characteristic of these masks in particular -- I only began seeing references to it in the last three pages.

If I tried that, I probably still wouldn't know how to swim! In sport style, you're supposed to exhale underwater, through mouth and nose at the same time. Nope. Can't make it work. Even out of water, I can exhale either through my mouth or my nose, but either one tends to shut down the other...

I hit upon the Valsalva maneuver by myself as a kid for air travel, after my mom tried to teach me other methods that I couldn't get to work. Chew gum? Really? No, it doesn't work on an airplane. But I'll give these a chance.

:rofl3: I used to think that taking low-paid seasonal field jobs would help my scientific career. Nope. They just helped me to get more low-paid seasonal jobs. What institute is going to pay good money when there is a steady stream of idealistic young people eager to do it for peanuts or...

So that's why his "Dive Dry" column here stopped.

Accidentally posted twice; editing the second one.

"Seems." That is a tricky word.

Seems to me that the gator is not the nuisance in this scenario. I'm with you. I think that part of the difficulty is that urban and suburban dwellers are detached from the reality of nature; so when they go ecotouristing, they think of the wildlife in the same way they would think of historic...

I'll take a crack at the ad's headline, without the assistance of Google Translate. It reads, "Con la linea sub G.S.D. è vostro il profondo mare azzurro" I translate, "With G.S.D.'s underwater line, the deep blue sea is yours." How did I do, @Angelo Farina ? It seems to be universal. In any...

I just read the resource on "Ear Problems in Scuba Diving," but it did not address this particular detail. I recently purchased a type of earplugs designed for air travel, to alleviate pressure changes and cabin noise. (That's not what I use them for; I use them in the grocery store because the...

Remind me why people like them in the first place???

After my experience with Dramamine Less Drowsy Formula, all I could say is, "Wow, I'd hate to see the More Drowsy Formula." Do you have any idea how hard it is to Clean Ship when you're about to fall asleep standing up? I was so "in tune" with the sea, I could be down in Sonar Control and feel...

Hope it does a better job than the "Computer Vision" on iNaturalist!

Given enough evolutionary time, they will become a cold water species.

I was delighted by those little dancing black fishes at the beginning.

Well, that depends on what names you consider cool. I joined in 2014, and got the exact name I wanted.

It seems counterintuitive for juveniles to feed adults -- the opposite of parental care. I wonder how it benefits the species.

Looks like I fell behind by three or four sessions. Oh, well; I'm caught up now. Since no translations were offered for those 1960 advertisements, I'll try my hand at the one with the woman in the black swimsuit. I don't speak Italian. But I do speak Spanish and Portuguese, which are Romance...

A good introduction for people who may not be familiar with the underwater world.