As Space Is an Ocean, naturally the space fleets in many Sci-Fi settings tend to follow the same lines as the wet navies of Earth. These are typically separated into three classes: Small Craft, Space Ships and Capital Ships. Forms the backbone of a Space Navy. Compare/contrast Standard Sci-Fi Army, which may be on hand to fight boarding parties or conquer worlds. To compare the size of ships from various series please use this finely crafted link for a very helpful site, that has all your Standard Sci Fi vessels in scale to one another.