Calculate without astronomical observations, 10 letters
Old navigational work, 13 letters
Absolutely correct, 9 letters
*Double, 10 letters
Carbon copy, 10 letters
Clone in horror films?, 10 letters
Duplicate, 10 letters
Exact look-alike, 10 letters
Look-alike, 10 letters
Perfect double, 10 letters
Spitting image, 10 letters
Twin, 10 letters
Spitting images, 11 letters
Sprint at top speed, 7 letters