I know this is an old thread, but just thought I should add my thoughts on this. I sailed aboard the T.S. Californian as a bosuns mate/watch captain. She is a magnificent ship, fast, sleek, maneuverable. I race (modern) sail boats semi professionally and worked as a rigger for years. I have owned a Myerchin and it was nowhere near as bad as the previous posters descrbed. I had the "light knife" which actually was handy. It was a secondary knife for me and saw lots of use. Lock up was solid and worked well. It was a serial numbered knife, don't know if they still are or not.
I currently carry a custom fixed blade rigging knife and custom spike, and typically a TL-29 as a back up. I lost my myerchin overboard two years ago, otherwise I would still be using it as a back up. I assume by now the young lady has left port, but a folding sike knife should not be the only knife one carries aboard ship. Too often are the spike and knife needed at the same time. I would get her a 6-7" Drew pattern spike for general use, but if she is going to be doing much rigging, a larger and smaller one are also needed. They don't know it, but Snap-On makes a great little spike, its their scratch awl. I made a larger fid from the tine of a deer antler, works great on heavy three strand.
Oh, and never rely on just a pocket clip when aboard. Always tether tools and valuables.
-Xander