Official names of the four status of submarine

Sorry to be so late for the replay.  My daughter is going to marry this weekend, so I don’t have enough chance to use our computer, especially on non-wedding topics.

Japanese Navy seems to be much primer than US Navy, at least superficially, especially in the field of universal science.  For example, we are not allowed to openly discuss the applied chemistry on submarine air treatment, such as how carbon monoxide is removed from the submarine atmosphere.

I was foolish enough to address a letter sealed in a closed envelope to the official office of the submariner Vice Admiral, not to his home address.  He replied to me openly, in his hand writing card, that he was not authorized to answer my questions.  He seemed to show his secretary or orderly that he had no intention to leak any information to a civilian whether it is classified or not.

As a father of an American Citizen, I have no intention to inquire any submarine operation at all.  If I have made a serious mistake, I want to be forgiven.

I have been reading  the Basic Enlisted Man’s Submarine Textbook from 1961 NAVPERS 16160-B, as well as the Navy Supplement to the DOD Dictionary of Military and Associated Terms.  I was a little bit surprised by the broad-minded liberal generosity for the publication of the once-classified information of the Navy, though they were declassified and obsolete now. 

I have seen the modern diesel submarine in the condition of deck awash or flooded down only two times.  They were seemed to be under Degaussing or Deperming or magnetic measurements in the very calm sea.

I know this condition is very critical to the submarine buoyancy, unless it has the good old classical conning tower.  My understanding is that if a mere small wave floods into the fairwater structure above the water surface just only a little bit, it increases the negative buoyancy and induces furthermore water flood into the remaining fairwater structure, and falls into a vicious cycle.　I believe that the only negative tank can be used to control the buoyancy to keep the depth of the submarine of this condition. 

I think this condition in very dangerous to a modern submarine without any conning tower, so modern submarines use this condition in only limited situations, such as magnetic measurement or deperming in the tranquil waters under appropriate supervision. 

I know this condition is not critical for an old boat with a water tight conning tower situated above the main hull.  However, this condition is still used for modern submarines with no conning tower, at least in the limited conditions.

The Japan Maritime Self-Defense Force submarine museum of Kure:

https://www.jmsdf-kure-museum.go.jp/en/

indicates the four basic condition of submarine, in Japanese Language, including this condition, between surfaced and periscope depth.  But no one there knows the correct English term.

I would like to know that my understanding is correct or not.  And if this kind of condition of the submarine still has a name, I want to know the correct term in English.  I don’t care its name is an official term or not.

If I am making a huge big mistake, forgive me please.

Dear Gerry

Than you for your kind advise. 

Deck Awash is a little bit familiar word to me, though I can’t find it in the U.S. NAVY DICTIONARY: Terms, Abbreviations, & Acronyms.

Like an old submarine underway with her deck awash and only the conning tower is above the water:

http://2.bp.blogspot.com/-rgGtfI2ckfs/TZHUyKOCT7I/AAAAAAAAEYY/iDA_b8KfN-U/s320/USS%2BTarpon%2B6.jpg

Or, the template periscope view of the diving submarine in a movie such as “Crimson Tide”.

Those were all forward moving submarines, but all the modern Japanese submarines of the third status that was between the surfaced and PD were standing still.  A vertical depth scale was painted on the sail.  A couple of submariners were carefully watching on the top of the sail, but none of them were wearing any life vest at all.

I think this status of the modern submarine was not the same of the old submarine of the Deck Awash status, but I am happy to know the most suitable term for it.

Thank you again.