Executive Officer
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An Executive Officer (abbrev. XO) is the second-in-command of a naval ship, reporting directly to the Commanding Officer (CO). It is common naval practice that the CO directs the ship in its mission, while the XO is responsible for ensuring that the ship and its crew are able to fulfill the mission as directed by the CO..
Many military units also have an officer who is second-in-command referred to as the executive officer.
Executive Officers in TRMN
In The Royal Manticoran Navy: The Official Honor Harrington Fan Association, Inc. (TRMN), naval chapters are ships, and each has a "command triad" consisting of:
- Commanding Officer
- Executive Officer
- Bosun
The prescribed minimum rank for the XO is one grade lower than the rank of the CO:
| Code | Hull Type | Minimum crew | Minimum CO rank | Minimum XO rank |
|---|---|---|---|---|
| LAC | Light Attack Craft | 3 | Lieutenant Senior Grade | (no XO) |
| DD | Destroyer | 6 | Lieutenant Commander | |
| CL | Light Cruiser | 8 | Commander | |
| CA | Heavy Cruiser | 10 | Captain Junior Grade | |
| BC | Battlecruiser | 12 | Captain Junior Grade | |
| DN | Dreadnought | 16 | Captain Junior Grade | |
| SD | Superdreadnought | 20 | Captain Junior Grade | |
| CLAC | Carrier, LAC | 15 | Captain Junior Grade |