Dradis is the primary system that the Galactica uses to detect friendly and enemy units beyond visual range. The console appears to have a range of at least one light second (less than the distance from Earth to the Moon), but less than one light minute (one/eighth the distance from Earth to the Sun).
How can we tell? We know that it’s less than one light minute because Galactica is shown orbiting a habitable planet around a sun-like star. Given our own solar system, we would have at least some indication of ships on the Dradis at that range and the combat happening there (which we hear over the radios). We don’t see those on the Dradis.
We know that it’s at least one light second because Galactica jumps into orbit (possibly geosynchronous) above a planet and is able to ‘clear’ the local space of that planet’s orbit with the Dradis
The sensor readings are automatically interpreted into Friendly contacts, Enemy contacts, and missiles, then displayed on a 2d screen emulating a hemisphere. A second version of the display shows a flat 2d view of the same information.
Friendly contacts are displayed in green, while enemy units (Cylons) are displayed in red. The color of the surrounding interface changes from orange to red when the Galactica moves to Alert Stations.
The Dradis is displayed on four identical displays above the Command Table, and is viewable from any point in the CIC. ‘Viewable’ here does not mean ‘readable’. The small size, type, and icons shown on the screen are barely large enough to be read by senior crew at the main table, let alone officers in the second or third tier of seating (the perspective of which we see here).
It is possible that these are simply overview screens to support more specific screens at individual officer stations, but we never see any evidence of this.
Whatever the situation, the Dradis needs to be larger in order to be readable throughout the CIC and have more specific screens at officer stations focused on interpreting the Dradis.
As soon as a contact appears on the Dradis screen, someone (who appears to be the Intelligence Officer) in the CIC calls out the contact to reiterate the information and alert the rest of the CIC to the new contact. Vipers and Raptors are seen using a similar but less powerful version of the Galactica’s sensor suite and display. Civilian ships like Colonial One have an even less powerful or distinct radar system.
2d display of 3d information
The largest failing of the Dradis system is in its representation of the hemisphere. We never appear to see the other half of the sphere. Missing half the data is pretty serious. Theoretically, the Galactica would be at the center of a bubble of information, instead of picking an arbitrary ‘ground plane’ and showing everything in a half-sphere above that (cutting out a large amount of available information).
The Dradis also suffers from a lack of context: contacts are displayed in 3 dimensions inside the view, but only have 2 dimensions of reference on the flat screen in the CIC. For a reference on an effective 3d display on a 2d screen, see Homeworld’s (PC Game, THQ and Relic) Sensor Manager:
In addition to rotation of the Sensor Manager (allowing different angles of view depending on the user’s wishes), the Sensor Manager can display reference lines down to a ‘reference plane’ to show height above, and distance from, a known point. In Homeworld, this reference point is often the center of the selected group of units, but on the Dradis it would make sense for this reference point to be the Galactica herself.
Overall, the crew of the Galactica never seems to be inhibited by this limitation. The main reasons they could be able to work around this limitation include:
- Extensive training
- Effective communication between crew members
- Experience operating with limited information.
This relies heavily on the crew operating at peak efficiency during an entire combat encounter. That is a lot to ask from anyone. It would be better to improve the interface and lift the burden off of a possibly sleep deprived crewmember.
The Dradis itself displays information effectively about the individual contacts it sees. This isn’t visible at the distances involved in most CIC activities, but would be visible on personal screens easily. Additionally, the entire CIC doesn’t need to know every piece of information about each contact.
In any of those three cases, crew efficiency would be improved (and misunderstandings would be limited) by improving how the Dradis displayed its contacts on its screen.