In this article, Blenkers tells us a little more about how we can distinguish the position of the crew
Captain responsibility is to ensure the safety and comfort of all passengers. Oversee the management of the entire ship, from navigation to entertainment and all other departments of the boat. Timely reports to the corporate office for everything that happened on board, as incidents, economic, etc ..., it is even authorized to perform weddings at sea.
On a cruise ship and depending on the size of the same can be two First Officers. Normally Safety Officer has the highest rank of First Officer in charge of navigation.
The Second Officer responsibilities include monitoring navigation and, led by the Director of the Bridge, perform administrative functions, maintenance and training.
It is responsible for the communications system of the ship. Mostly made satellite, including telephone communications, radio, GPS, television and the Internet.