No.
SALUTE IS THE HIGHEST FORM OF MILITARY COURTESY AMONG MEN AND WOMEN IN THE MILITARY. IF YOU ARE A CIVILIAN WHO WALKS TOGETHER WITH A MILITARY OFFICER, AUTOMATICALLY, THE SUBORDINATES OF THAT MILITARY OFFICER YOU ARE WALKING WITH WILL RENDER A SALUTE AT LEAST 6FT IN DISTANCE AND SHALL BE ANSWERED BY THE OFFICER BEING SALUTED.
Technically an Officer Candidate outranks every enlisted rank. However, they are not officers and you do not salute them. In some situations on a post if the Officer Candidate School trainers deem it necessary, they may make passerby's salute the candidates if they are being disrespectful. This really depends on the SOP of the post, but in general the answer is no.
for respect for your officer
no
It's actually a bit tricky, but no - the enlisted member should salute the approaching officer after the senior officer has returned the junior's salute or as the junior officer approaches, assuming the senior officer diverts attention from the enlisted to return a salute rather than just acknowledge the salute by a nod. The junior will then return the enlisted member's salute after the senior officer has returned the junior's salute, and the enlisted should hold the salute to the junior officer until returned by the junior officer. However, if the enlisted is engaged in conversation with the senior officer, it is disrespectful to divert attention away from a senior officer to an approaching junior officer to salute. When it occurs, it usually it happens simultaneously when the situation warrants. Most senior officers don't like to be interrupted during a formal conversation (and it's disrespectful to do so unless it's warranted), so most avoid the situation altogether. It depends on the setting as well, e.g., formal or informal, indoors (yes, salutes are rendered indoors at certain functions) or outdoors, etc. Most of the time if a senior officer is engaged in conversation with a junior (enlisted or otherwise), unless it's urgent, the officer wishing to speak to the senior will wait until the senior is finished. If just passing by, the junior may salute the senior, at which point the senior may either acknowledge the salute by a nod, or return if appropriate.
No, there is no requirement to salute a retired officer. If a lower ranking person wants to salute a retired officer as a sign of respect, that would be appropriate. However, it is not required by regulation.
When leaving the ship you salute the officer on duty and ask permission to leave the ship. Then you stand on top of the gangway, face the flag and salute it. This is to show your respect to America and the flag. When leaving the ship you salute the Officer on Duty and ask permission to leave the ship. Then you stop at the top of the gangway and salute the flag. This is to show respect to America and the flag.
They do salute indoors... If they didn't salute, it would be another reason such as: There wasn't a officer or anyone/thing to salute. They weren't in uniform. They had no cap/lid/(headgear of some variety) on. Ect.. there are many other reasons. But they do salute indoors.
The salute is the greeting among the military. The junior rank/enlisted is required to render the salute first and hold it until the officer drops his salute. Cadets have not taken the oath of office and have not been commissioned. They may be saluted by enlisted. An officer would return a cadet's salute. It is not be a requirement for an enlisted man to render a salute to a cadet but it may not be career enhancing to give a cadet the brush-off when presented with the opportunity to render the greeting.
Yes
by your leave