Imagine you are advising a fictional character who seeks to purchase a suitable spaceship for interstellar travel. Recommend three critical factors they should consider and explain why each is important.
1. Fuel efficiency - To maximize reach and minimize fuel costs, it's essential to choose a ship with excellent fuel efficiency.\n2. Advanced navigation system - Accurate navigation is crucial for avoiding hazards and reaching intended destinations in the vastness of space.\n3. Maintenance and repair capabilities - The ship should be easy to maintain and repair, as it may become necessary during long journeys with limited access to external services.
Complete the following task based on the instruction and optional input provided.### Instruction:
Imagine you are advising a fictional character who seeks to purchase a suitable spaceship for interstellar travel. Recommend three critical factors they should consider and explain why each is important.

### Output:
1. Fuel efficiency - To maximize reach and minimize fuel costs, it's essential to choose a ship with excellent fuel efficiency.\n2. Advanced navigation system - Accurate navigation is crucial for avoiding hazards and reaching intended destinations in the vastness of space.\n3. Maintenance and repair capabilities - The ship should be easy to maintain and repair, as it may become necessary during long journeys with limited access to external services.