No. A Rear Admiral is a one or two stars officer, while an Admiral is a four-star officer.
The Admirals rank is as follows:
1 star: Rear Admiral (lower half)
2 star: Rear Admiral (upper half)
3 star: Vice Admiral
4 star: Admiral
Where 4 star is the highest, equivalent to an Army or Air Force General.
No. Rear Admiral (equivalent to a Major General) is one grade higher than a Brigadier General.
Yes
Admiral is a higher rank than Captain. A Captain would be promoted to Rear Admiral. Then it is Vice Admiral, Admiral and Fleet Admiral.
A commodore admiral is a flag officer of a rank between captain and rear admiral.
Captain 1st Rank in the Russian Navy is the highest Senior Officers rank, preceded by Captain 2nd Rank and followed by Rear Admiral. It corresponds to the rank of Colonel in the Army and the Air Force.
Admiral of the Fleet Admiral Vice Admiral Rear Admiral Commodore Captain Commander Lieutenant Commander Lieutenant Sub Lieutenant Ensign
No, a US Navy vice admiral does not outrank a rear admiral. A rear admiral is a two-star rank, while a vice admiral is a three-star rank. Therefore, a vice admiral outranks a rear admiral.
Captain is a different rank in different branches. In the Army, Air Forces, and Marines, Captain is pay grade O-3, is abbreviated "CPT" or "Cpt", and is equivalent to a Navy Lieutenant. In the Navy, a Captain is pay grade O-6, and is equivalent to a Colonel in the Army, Air Force, or Marines. In both instances, Rear Admiral is the higher rank. Rear Admiral is pay grade O-8, and is equivalent to a Major General in the Army, Air Force, or Marines (what would be referred to as a "Two Star General").
At one time it was commodore who was in charge of a warship squadron, but the rank is not used anymore. I think that now rear admiral is the next highest over captain. The foregoing is correct. The title of Commodore is used to designate someone who is the commander of a number of units, such aircraft or ship squadrons. The rank of Commodore has been replaced by Rear Admiral (lower half) and the insignia is two stars or a broad band and a smaller stripe on the sleeve.
Admiral. There are 4 "levels" of admiral, beginning with rear admiral (lower half), then rear admiral (upper half), vice admiral and then admiral. During wartime, the Navy has had a rank of Fleet Admiral, a rank held by commanders of major components of the Navy, such as Chester Nimitz in World War 2. Additionally, the Navy's highest Admiral in terms of position is the Chief of Naval Operations. The highest enlisted rank is Master Chief Petty Officer.
Depending on the particular rank of Rear Admiral (Rear Admiral or Rear Admiral(lower half) the abbreviations are: Rear Admiral - RADM (O-8) Rear Admiral(lower half) - RDML (O-7) RDML is similar to a Lieutenant (Junior Grade) in that it is the lowest and most junior of the Admiral ranks.
The commander of a vessel; Captain. The rank of "Commander" is called commander. A "Commander" in the US Navy is equal to a US Army LTC (Lieutenant Colonel-silver oak leaf). A USN Lieutenant Commander is a US Army Major.
Rear Admiral.
The ranks above Captain in the Army are: Major, Lieutenant Colonel, Colonel, Brigadier General, Major General, Lieutenant General, General, General of the Army (UK Fieldmarshal). Occasionally the American General ranks are are referred to simply by the number of stars in their insignia, e.g. 1-, 2-, 3-, 4-, or 5-star General. The ranks above Captain in the Navy are Rear Admiral (lower half) (UK = Commodore), Rear Admiral, Vice Admiral, Admiral, Fleet Admiral (UK=Admiral of the Fleet, though not used in peacetime)