Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Religious icon

If you go offshore, even as casual crew, you need to have read this book. Its primary value is the incredible knowledge Seifert has on boat construction. You will see discussions of why it is not a good idea to put tape on stainless steel, why you should never mix steel and aluminum in fittings, how to properly crimp an electrical wire connector, etc. It will come with a very clear discussion of what bad thing will happen if you ignore the advice, and it is straightforward enough that you will do what he says, and know that you are better for it.Don't own a boat? So what are you going to do when the boat you are on has problems? Note there was no 'if' in the previous sentence. Read this book first.At one point Seifert made his living as what would now be called a 'Technical Writer'. I happen to admire that breed, and his experience comes through in the clarity of his discussion. This is a thin book, it is not an incomplete book.