Which of the following vessels does not typically show an anchor light?

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When a vessel is at anchor, the signal most vessels use is a white all-round light to mark its position for others. But some vessel types have specialized lighting that communicates their current activity more clearly to nearby traffic. A vessel engaged in fishing, specifically fishing other than trawling, uses lighting that signals its fishing activity and gear rather than the generic anchor indication. Because of this, it does not typically display the standard anchor light in the same way as other anchored vessels. The other listed vessel types are more likely to follow the regular anchored-signaling practice or use their own operation lights in addition to, or in place of, a basic anchor light, but they’re not the ones that commonly omit the anchor light as part of their usual signaling.