Why the passengers board from the left hand side?

Welcome to today's blog...

Let's talk about why passengers board from the left-hand side. Before, I start I want to say there is no critical reason why we use left-hand side for the boarding, but according to the research, I will explain the reason. Within the world, 99% of the aircraft (e.g. Airbus 320, Boeing 737) have left side boarding; however, there are few exceptions such as Military planes (they use rear boarding), Boeing C-17, 747/8 and MD-80. We have already discussed one blog about Airbus 320 which was about how to land an aircraft during any emergency situation. 

Mostly, you board the flight from the front and/or aft left door of the aircraft and the right-hand side of the aircraft is used for the languages, freight packages, loading/unloading of pallets, refuelers, etc. From this, we can conclude one reason that the flight manufactures/carriers do not want any intervention with the passengers on the same side of the luggage dept and etc. Based on the research, they have specified many reasons in the Aviation sector, but we cannot discuss everything let's go back in days and see why was it like this? 

In the maritime industry the ships were used to steer from the right-hand side or know as starboard side, thus, the left side was used for loading and unloading and dock the left side on the port, i.e., port side. During the technology transition, the same concept of the left-hand side boarding was used in the Aviation Industry. The first reason was already discussed above, then it comes to the kitchen area, crew seats which are on the right side of the aircraft, hence, the boarding is done from the left doors. So that the right side of the aircraft can be used by ground support workman, loading packages and ground crews. The same concept of the maritime industry was evolved in the Aviation Industry and every aircraft is built with the same specification. 

Schematic view of an Aircraft.

I have one question Why Captain sits on the left side of the plane? Can anyone answer it? "No google"

Thanks for reading it....