Info Diving and Seamanship

[Wookie]

I wish it were as simple as RRR. Around here there are too many islands, channels and rivers that are marked where that simply does not work. The more complete rule is when heading "upstream" keep the solid green buoys on your Port side. Upstream is defined as travelling toward the headwaters of a river, into port or with the flooding tide. Many times the only useful one is "with the flooding tide" as there is no port or river nearby, and even then in some weird places where the flooding tide meets coming from opposite directions even that is questionable by observation and the chart is the only way to know for sure.

Typically inland waters are “returning” clockwise around North America, and are denoted with a yellow stripe.

 

[WeRtheOcean]

Nomenclature: Nothing says "keep an eye on this guy" more than going to up to the "pointy end". The list can go on forever but here is a start:

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Oh, and be careful not to trip on the coaming. I once barked my shin, right through my pant legs, that way.​

 

[Akimbo]

Oh, and be careful not to trip on the coaming. I once barked my shin, right through my pant legs, that way.

That's why many sailors call the lower hatch coaming on watertight doors "knee knockers". Most range from shin knockers to trip hazards but knee knocker sounds better.

Obround submarine hatches are high enough to be knee-knockers. No matter what you call them, they can all draw blood.

 

[Darnold9999]

Typically inland waters are “returning” clockwise around North America, and are denoted with a yellow stripe.

Learned something thanks. However the word “typically” covers it. Lots of exceptions in my local waters. Have a look at the channel between Vancouver Island and the mainland. Also Puget Sound. Lots of markers that are on actual flood not clockwise - others on clockwise not actual flood. Local knowledge or charts required.

 

[Capn Mike]

Wow, encyclepeadic.. I learned a few things.

 

[Bob DBF]

That's why many sailors call the lower hatch coaming on watertight doors "knee knockers".

On the boats we had real knee knockers. A picture is from the USS Albacore. Now imagine going through that at a run, needless to say one tries not to make a second error in judgement.

@Akimbo note the pressure gauge above the door, it lets you know the pressure in the other compartment. A handy fact is you want to open the door without eating it.



Bob

 

[Wookie]

On the boats we had real knee knockers. A picture is from the USS Albacore. Now imagine going through that at a run, needless to say one tries not to make a second error in judgement.

View attachment 552022

@Akimbo note the pressure gauge above the door, it lets you know the pressure in the other compartment. A handy fact is you want to open the door without eating it.



Bob

That’s a submarine hatch, looks like the one between forward torpedo and con. I’ve both toured an S-boat and dived one on Trimix. It could be the one between aft torpedo and the engineroom I guess. At 6’2” and 300 lbs, I have a hard time passing through. Even at 6’2” and 240 it would not have been much better.

 

[Bob DBF]

That's heading back into engineering. This Albacore was the diesel submarine built to test what would become the nuclear submarine hull. It's now a museum in Portsmouth, NH. The door is farmiliar, since it's standard WWII vintage, since the test depth is similar. The Nuc boats are the same opening but built heavier for the deeper depths.

On the west coast, the USS Blueback is a museum in Portland. The Blueback and her two sister ships were the last class of diesel boats built by the US, they used the Albacore design and are similar.

...I have a hard time passing through. Even at 6’2” and 240 it would not have been much better.

It's all about technique, and practice.


Bob

 

[Wookie]

It's all about technique, and practice.


Bob

I toured the George Washington in Port Canaveral while in nuke school in Orlando during the Ohio sea trials. That following Monday I found a Personnelman and removed my subvol from my records...

 

[Bob DBF]

Was it the boat, or the inhabitants?


Bob