Imperial Méxica Navy

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From left to right:
Fleet shipsuit worn with emergency z-helmet.
Fleet z-suit.
Fleet light combat armor.
Collar insignia of an IMN Chu-sa including the Xiuhcoatl (the personification of drought and scorched earth) of the Fleet and four zugaikotsu rank pins
Eagle glyph worn by an Imperial warleader
Example Ships of the Fleet
Top: Light class vessels displayed in side and dorsal profile

Middle: Medium class vessels displayed in side and dorsal profile; inset shows a light cruiser for scale comparison

Bottom: Capital class vessels shown in profile; inset shows a battlecruiser and light cruiser for scale comparison

Note: These outlines are not canonical

Mekishikono Teikoku Kaigun

The Imperial Méxica Fleet. The primary language of the Admiralty is Nihongo.


The fire-snake symbol of the Navy is worn on uniforms as a collar tab:

  • In gold for a captain.
  • In copper for a midshipman.

The ship symbol is displayed on the breast of the dress uniform and beside it a glyph:

The number of zugaikotsu pins on the collar insignia also indicates rank.

The standard uniform is the shipsuit. In high alert conditions all crew will wear z-suits.

Fleet z-suits and Imperial Marine z-armor and combat armor are a dull black.

A Snake-Eagle-Arrow glyph is the symbol of the Fleet, displayed on the tails of IMN shuttles.

IMN equipment uses a gold-gray-olive color scheme.

The Fleet

The Kaskeala yaochimalli battle shield is being fitted to battleships and heavy carriers.

Ships are built using hexacarbon, battle-steel, glassite and shipskin. The spaceframe is constructed from hexacarbon.

There are three watches on IMN ships.

Training exercises include:

Fleet Organization

Fleet Units
Rengo Kantai Combined Fleet
Tai Division composed of two to four Kantai
Keibi Kantai Patrol Fleet
Kantai Fleet or flotilla
Sentai Battlegroup/Squadron: four battleships or cruisers with a number of attached Suirai Sentai
Suirai Sentai A light cruiser and four Kuchikutai
Historically a torpedo squadron
Kuchikutai Four destroyers
Uji Sentai Clan Squadron
Buntai Detached unit such as a patrol cruiser

Service Branches

Nisei Terminology
Shuryokukan Tai Main Fleet
Issekigan Seeking Eye
Eda Tai Detached Duty
Sekkou Tai Scout
Teikoku Kaigun Rikusentai Imperial Marines

Detached Duty Roles

Nisei Terminology
Teisatsu Reconnaissance - long-distance search
Shōkai Patrolling - defensive scouting
Sōsaku Searching - either activity

Service Traditions

Naming Conventions

Division between Starman and Marine

Aboard ship there is a strict division between Fleet starman and Imperial Marine. Marines do not mix with Fleet and vice-versa. Crew quarters are traditionally separated and meals are taken in alternating shifts. Ground-side or on stations, the respective contingents take pains to avoid each other in recreational areas.

In Fleet Academy there is an old ‘service legend’; the master gunnery sergeant and the master chief petty officer of each ship keep a logbook of stations, ports of call, and planetary facilities. In this legendary “black book” are listed all of the bordellos, pubs, stimshops, cheap restaurants, and resorts in each locale. By some means - tossing a knife, casting patolli beans, taking a tlachco shot - these venues are divided between Fleet and Marine on a ship by ship basis. Should an unwary crewman wander into a den of his own Marines, he will be politely shown the door. If a crewman from another ship entered, however, then all bets are off.

Inter-ship rivalries are strong in the Fleet and those reflecting disputes among the Seven Hundred Clans often become violent.

The Huitzitzilnahualli

The tradition of the Huitzitzilnahualli is used to repair men’s apprehension – their fear of ill-luck when a part of a ship has been tainted by calamity or touched by evil.

The huitzil goes into these places, to take upon himself the burden of this ill-luck, these curses, this dreadful karma and by this sacrifice to ease the minds of crewmen so that there is no subconscious avoidance of a place or thing.

Classes of Imperial Méxica Navy Ships

Named classes of IMN ships include:

See also IMN hull designations.

Ship Classes
Gunkan Warships Battleships, cruisers and carriers
Kantei Combat vessels Light cruisers, destroyers and frigates
Sekkou Kantei Scout vessels
Tokusetsu Kantei Auxiliary ships Supply and special ships

Ship Types
Abbreviated form
Chou Dokyuu Senkan Super Dreadnaught
Dokyuu Senkan Dreadnaught
Bokan Carrier
Senkan Battleship
Junyo Senkan Battlecruiser
Jyu-Junyoukan Jyu-Jun Heavy Cruiser
Kei-Junyoukan Kei-Jun Light Cruiser
Kuchikukan Destroyer
Tokumukan Auxiliary
Chousasen Research ship
Yusousen Troopship
Kaisokusen Raider
Shiryakusen Privateer

Ranks of the Fleet

Collar insignia of a Thai-sho.
Note the zugaikotsu rank pins combined with the Méxica glyph for the atl-tlachinolli, burning water, the symbol of 'blossoming war'.
Collar insignia of a Sho-sho
Collar insignia of a Thai-sa.
Note the zugaikotsu rank pins.
Collar insignia of a Chu-i
Collar insignia of a Sho-i
Collar insignia of a Sho-i ko-hesei
Collar insignia of a Seito
Collar insignia of a Heisocho
Nisei Term Fleet Rank
Bukan Officers
Thai-sho Admiral
Chu-sho Vice Admiral
Sho-sho Rear Admiral
Thai-sa Captain
Chu-sa Commander
Sho-sa Lieutenant Commander
Thai-i Lieutenant
Chu-i Lieutenant junior Grade
Sho-i Ensign or Sub-Lieutenant
Sho-i Ko-hosei Midshipman
Seito Cadet
Jun-i Warrant Officers
Heisocho Warrant Officer
Kashikan Non-Commissioned Officers
Joto-Heiso Chief Petty Officer (Chief Boatswain)
Itto-Heiso 1st Petty Officer (Chief Boatswain's mate)
Nitto-Heiso 2nd Petty Officer (Boatswain's mate)
Santo-Heiso 3rd Petty Officer
Kashikan Hei Enlisted Ranks
Seiheicho Leading Starman
Joto-Seihei Able Starman
Itto-Seihei 1st Starman
Nitto-Seihei 2nd Starman
Santo-Seihei 3rd Starman (Recruit)
  • The term Sei star can be eliminated from the rank.
  • Thai-sa is sometimes pronounced Dai-sa.

Officer Titles

Officer Titles
Kaigun Kyo Lord of the Navy
Kaigun Dayu Vice-Lord of the Navy
Kaigun Shoyu Deputy Vice-Lord of the Navy
Dai-Gensui Admiral of the Navy+
Gensui Admiral of the Fleet
Shirei Chokan Commander in Chief
Kaigun Gunrei Bucho
Gunreibu Socho
Chief, Naval General Staff
Kaigun Sanbo Bucho Chief, Naval Staffs
Jiju Bukan Aide-de-camp to the Emperor
Togu Bukan Aide-de-camp to the Crown Prince
Otsuki Bukan Aide-de-camp to a Prince or
the Admiral of the Fleet
Taishikan tsuki Bukan Naval Attaché
Taishikan tsuki Bukan Hosakan Assistant Naval Attaché

+ Accorded only to the Tenno no Nihon.

Officer Titles Aboard Ship

Senior Officers
Kancho Commanding Officer
Kuchikukancho Commanding Officer of a destroyer
Tokumukancho Commanding Officer of an auxiliary
Fukucho XO
Kikan-cho Chief Engineer
Kikan-shi Assistant Engineer
Kokai-cho Chief Navigator Officer
Kokai-shi Assistant Navigator
Unyo-cho Chief Operations Officer
Hojutsu-cho Chief Weapons Officer
Tsushin-cho Chief Communication Officer
Gun-i-cho Senior Medical Officer
Hokyu-cho Chief Supply Officer
Hikotai-cho Wing Leader


Each branch is under the authority of a Kaigun Kyo.

Service Branches
Kika-no Engineer
Gun-i Medic
Shukei Paymaster
Zosen Constructor
Sekkou Scout

The Service Branch is used to prefix the full rank. Thus an Engineering Lieutenant is a Kikan Thai-i and a Constructor Lieutenant Commander is a Zosen Sho-sa.

IMN Personnel Files

Imperial Méxica Navy Bases, Ships and Stations


"In the time of the Sixth Sun" by Thomas Harlan
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