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« on: June 16, 2020, 02:59:31 PM »
Pieter,
However, the original poster inquired about vessels with IMO numbers. "Ships" is such a loosely defined term that I don't even want to get into that debate.
The fact is, fishing vessels, tugboats and yachts over 100 gross tons make up a massive portion of the vessels allotted identification numbers by the IMO, and are often overlooked by the Miramar database. Even if they do not match your personal opinion on what is, or is not, important, they are a major player in the "tens of thousands" of vessels described in the initial post.
Do not get me wrong, I consider Miramar to be an invaluable resource for historical research. However, when it come to the topic brought up by the original poster, all vessels with IMO numbers, my experience shows me it would be better off used as one of many supporting sources.
The issue with databases is that they all have holes. As such, relying on a single database is folly, and the only way to be truly comprehensive is to unite multiple sources of data. Unfortunately, like any solution we're pondering, that takes time, work and money.