First Steps First
Depending on who you work for, you will most likely start your journey to meet your ship from where you will be located on the day you leave for your hitch. Companies coordinate with mariners to schedule flights and ensure that they fly you to the destination where the ship will be located on a specific date and time (aka 'meeting the ship').
You pack up your stuff and be sure to bring whatever paperwork you will need to sign on to the ship, as well as any tools or wrenches you want to bring. Most of the time, it is a good idea to bring a flashlight (most important), multi-tool and an adjustable wrench (for engineers at least) with you because you typically will ALWAYS carry these items with you when working, and they may or may not be provided to you by your company, depending on how stingy your company is.).
It is also good practice to wear a set of work clothes while traveling, including your steel-toed boots. You might ask, "Why is that?" Let's face it, luggage gets lost, especially in remote, under-developed locations, it is not unheard of for luggage to just 'go missing' or 'walk-away' during your travels, never to be seen again. Therefore, it is important to carry any critical paperwork or clothing in a carry-on bag or backpack to keep with you on your person the whole time. I mentioned that a set of work clothes should be worn, especially your boots, because ships may not provide that gear for you and may turn you away if you do not have proper safety gear.
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Upon arrival in your destination, it's time to go meet the ship. You take a taxi, rental car, a ship's agent (a local representative who is hired to work with the ship when it is in a foreign location), or even a helicopter (for those people who work on oil rigs), who then will take you to the vessel. You grab your stuff, walk up the gangway (the stairs that provide a bridge from the pier onto the ship), and stop at what is called the quarterdeck. The quarterdeck is the general name for wherever people enter the ship from the gangway (or ship's brow) and serves both to screen and keep track of people who go on and off the ship, and as security if an unauthorized person should attempt to get onto the ship from the gangway.
What if the ship is not at the pier? There are many reasons a ship may not be at the pier. If you're trying to get on, it is most likely sitting at anchor somewhere close by. In that case, you would take what is called a launch boat, which would take you to the ship. The ship then typically picks your bags up with an onboard crane and would drop a ladder down for you to walk up and get onboard. As mentioned before, if your vessel is too far offshore, such as an oil rig, a helicopter would transport you out to your oil rig or vessel.