1. A cigar-shaped log with rotary fins that measure the ship's speed
   - patent log, screw log

Derived forms: taffrail logs

Type of: log

• exploding cucumber
• exploit
• exploitable
• exploitation
• exploitative
• exploitatory
• exploited
• exploiter
• exploitive
• exploration
• explorative
• exploratory
• exploratory survey
• explore
• explorer
• explorer's gentian
• explosion
• explosive
• explosive charge
• explosive compound
• explosive detection system
• explosive device
• explosive mixture
• explosive trace detection
• explosive unit