what is the significance of the 21 gun salute, why not 18 or 12?

Answer 1

"Salute by gunfire is an ancient ceremony. The British for years compelled weaker nations to render the first salute; but in time, international practice compelled "gun for gun" on the principle of equality of nations. In the earliest days, seven guns was the recognized British national salute due to seven being the standard number of weapons on a vessel. In that day, gunpowder made from sodium nitrate was easier to keep on dry land than at sea. Thus those early regulations stated that although a ship would fire only seven guns, the forts ashore would fire three shots to each one shot afloat, hence the number 21.

With the increase in quality of naval gunpowder, by the use of potassium nitrate, honours rendered at sea were increased to the shore salute. 21 guns became the highest national honour, although for a period of time, monarchies received more guns than republics. Eventually republics gained equality in Britain's eyes."

Answer 2

gun salute is given to show deference.

in the past it was a sign of convincing the other party that there was no intention of firing a shot.

so the ships which had 7 guns used to fire them and since in those days it took very long to reload guns therefore it was seen as a convincing action.

since it was assumed that guns based on land could fire at thrice the rate of those on ships therefore 21 guns were fired from land.

thats how the 21 gun salute started.

it is given to the head of states and visiting dignitaries but the number varies based on rank

Answer 3

It appears to be complicated and has reference to the planets, the number 3 and the bible. see the site below for info.

Answer 4

it was a maritime tradition.when a ship came into port it empty it cannon to show it was not a threat. it was also custom for a ship when it was ready surrender to clear it's guns