Clue: Speedy planes: abbr.

Answer: SSTS

Length: 4

---

Similar Clues:

• When planes are expected: Abbr. (ETAS with 4 letters)
• When planes are due: Abbr. (ETAS with 4 letters)
• Some lines that run parallel to planes: Abbr. (RRS with 3 letters)
• Speedy: Abbr. (FST-8 with 5 letters)
• Retired planes: Abbr. (SSTS with 4 letters)
• Speedy planes (SSTS with 4 letters)
• Retired fast planes: Abbr. (SSTS with 4 letters)
• Grounded planes: Abbr. (SSTS with 4 letters)
• Former fast planes: Abbr. (SSTS with 4 letters)
• Fast planes: Abbr. (SSTS with 4 letters)