In most Science Fiction, the rank and command structure is based on real world navies; as such the rank of a commanding officer of a starship can range from Ensign all the way to Admiral, depending for the most part on the size of the vessel.
Captain is both a rank and title. In a military structure based on real world navies, the rank of Captain falls between 'Commander' and 'Admiral'
The title of Captain refers to the officer in command of the vessel, who is responsible for its safe and efficient operation, including navigation, crew management, etc. All persons on board, including officers and crew, other shipboard staff members, passengers, and guests, are under the captain's authority and are his ultimate responsibility.
Mr Spock is the second-in-command of the Original Starship Enterprise, his rank is Commander. He also serves as the chief Science Officer.
In 1945, Paul Tibbets held the rank of Lieutenant Colonel in the United States Army Air Forces. He is best known for commanding the B-29 Superfortress, Enola Gay, which dropped the atomic bomb on Hiroshima, Japan, on August 6, 1945. His leadership during this mission played a significant role in the conclusion of World War II.
Rupert Brooke held the rank of temporary lieutenant in the Royal Naval Volunteer Reserve during World War I. He served as an officer on the HMS Blake, a cruiser, and was involved in naval operations before his deployment to the front lines. Brooke is best known for his poetry, particularly his war sonnets, which reflect his experiences and ideals about duty and sacrifice.
Kiran Bedi is a retired Indian Police Service (IPS) officer, not an Indian Administrative Service (IAS) officer. She joined the IPS in 1972 and became the first woman to do so. Bedi is known for her significant contributions to policing and social reform, but she does not hold a rank within the IAS.
Lt. Commander Data is a Soong-type sentient android who served aboard the U.S.S. Enterprise, NCC-1701 D, a Galaxy Class Starship of the Federation. He was played by Brent Spiner.
No, there is no such rank in the US Navy. There is a Vice Admiral ranking. And the assistant to the commanding officer of a vessel is called the Executive Officer.
Regardless of rank, the commanding officer of a ship is always referred to as the ship's captain.
A commander is an officer of any rank who is actually commanding an army/navy/airforce unit. A general is someone having that specific rank, but who is not necessarily actively commanding an army unit.
Admiral of the fleet
Attention on Deck is called for on the arrival of the Commanding Officer. It is also used for any Flag grade officer, which is Captain or Above. The first person to spot the arrival calls the room to attention.
The first rule is when your commanding officers comes into the room. When someone above the rank of your commanding officer enters the room. When a Medal of Honor winner enters the room.
Mr Spock is the second-in-command of the Original Starship Enterprise, his rank is Commander. He also serves as the chief Science Officer.
well the next commanding officer with the greatest rank would replace him
It depends on the rank of the officer in question as to the rank of driver (senior officers rate higher ranked drivers), but in most cases, it's whoever has the duty that day for driving or attending the officer in question. In most cases, it's a Senior Enlisted Petty Officer on the Officer's staff.
Any military demotion would have to be accomplished through an administrative disciplinary action or a courts martial. These are under the purview of the command the individual is attached to. The unit commanding officer or his designee could perform these actions, and as for rank, a commanding officer could be almost any officer rank, depending on the type of unit. This, of course, is only in the case of a E-5 or E-6. An E-7 or higher would require a brigade level or higher Courts Marshall.
commander RNR
A Captain generally is an officer holding the O-6 rank. However, An officer who is in charge of a ship can also be called a Captain. For example a Commander (O-5) who is the Commanding officer of a ship is the Ships Captain.