In addition, many different companies, industries and even locales have different work schedules, and base wages. Throw into this the difference between some different boats at the same company! To get a number you can compare you need to make sure you are comparing apples to apples.
Generally an introductory deckhands wage would be in the vicinity of 35,000. Sometimes as low as 30,000, possibly as high as 45,000. More or less. In some areas the wage would be more, in some less. But there are variables such as healthcare, 401k, paid training among others. At your point, just go out and beat the docks for a job. Take ANY job you can get. Once you get more experience then you will be easier hireable at another company. Another issue is work schedule. Some companies work even time. Some work uneven time. This means you may work either one month on/one month off. Or two months on/one month off. So you can see that at some companies you willbe working 6 months a year. But at others you will work 8 or 9 months a year. So you have to do the math to see how well you are actually doing. Some guys who are young don’t mind working a lot, with no family life love working uneven time. That would be up to you.