In starship classification, an explorer is a multi-role starship, equipped with a wide variety of tactical, scientific and diplomatic capabilities. Vessels of this type are similar to heavy cruisers in that they carry considerable defenses, and are intended to perform long-duration missions, lasting numerous Earth years.
The Galaxy class is an example of this type of ship.
- The "explorer" type is derived from the original designs, graphics and technical drawings of the Enterprise-D by Andrew Probert, Rick Sternbach and Michael Okuda. More information aboutthe explorer designation exists in the Star Trek: The Next Generation Technical Manual.
- This designation was mentioned in the script of TNG: "Yesterday's Enterprise", noting that the alternate timeline Enterprise-D differed from the familiar explorer-type ship.