When your ship runs across a Detached Duty Ship, here's a table you can roll on to determine what kind.
Detached Duty Ship Encounter Table
2 Surplus Scout/Courier
3 Non-standard Scout
4 Surplus Scout/Courier
5 Serpent-class Scout
6 Surplus Scout/Courier
7 Surplus Scout/Courier
8 Surplus Scout/Courier
9 Pocket Scout
10 Serpent-class Scout
11 Non-standard Courier
12 New Scout/Courier
Detached Duty Ship Encounter Table
2 Surplus Scout/Courier
3 Non-standard Scout
4 Surplus Scout/Courier
5 Serpent-class Scout
6 Surplus Scout/Courier
7 Surplus Scout/Courier
8 Surplus Scout/Courier
9 Pocket Scout
10 Serpent-class Scout
11 Non-standard Courier
12 New Scout/Courier