Navigation hazard
The crossword clue "Navigation hazard" is answered by REEF, a 4-letter entry. Used 13 times across 11 distinct years; most recently in 2016; first recorded in 1960. It appears in 6 publications in the xd corpus. Every figure on this page comes from the collection data itself, never from a guess.
The answer
REEF
4 letters. See every clue for this answer on the REEF answer page.
Used 13 times across 11 distinct years; most recently in 2016; first recorded in 1960. It appears in 6 publications in the xd corpus. Frequency and last-seen figures come from the xd crossword corpus only.
Other answers for this clue
The same clue has also been answered these ways in the xd corpus. Answers inside this collection link to their own answer page.
Other clues for REEF
Every other clue in this collection answered by REEF, most used first.
- Coral formation - used 107 times, most recently in 2026
- Coral ridge - used 42 times, most recently in 2026
- Great Barrier ___ - used 39 times, most recently in 2026
- Snorkeling site - used 38 times, most recently in 2026
- Coral structure - used 34 times, most recently in 2026
- Sailing hazard - used 24 times, most recently in 2025
- Marine hazard - used 21 times, most recently in 2018
- Snorkeling spot - used 20 times, most recently in 2026
- Coral construction - used 18 times, most recently in 2025
- Boating hazard - used 16 times, most recently in 2023
- Coral habitat - used 16 times, most recently in 2025
- Offshore hazard - used 12 times, most recently in 2016
- Shipwreck site - used 12 times, most recently in 2023
- Atoll protector - used 11 times, most recently in 2019
- Coral creation - used 11 times, most recently in 2022
- Shoal - used 11 times, most recently in 2002
- Atoll barrier - used 10 times, most recently in 2021
- Australia's Great Barrier ___ - used 10 times, most recently in 2025
- Coral ___ - used 10 times, most recently in 2025
- Shorten sail - used 9 times, most recently in 1996
- Nautical hazard - used 8 times, most recently in 2017
- Sea hazard - used 8 times, most recently in 2007
- Shipping hazard - used 8 times, most recently in 2021
- Underwater obstacle - used 8 times, most recently in 2018
- Boat bottom bumper - used 6 times, most recently in 2013
- Boater's hazard - used 6 times, most recently in 2016
- Coral colony - used 6 times, most recently in 2025
- Coral ecosystem - used 6 times, most recently in 2026
- Snorkeling locale - used 6 times, most recently in 2024
Related clues
Clues in this collection of the same answer length that share a word with this clue, or match its answer pattern when no word is shared. Most used first.
- Golf hazard - TRAP, used 79 times
- Hazard - RISK, used 52 times
- Links hazard - TRAP, used 41 times
- Golf course hazard - TRAP, used 22 times
- Sandy golf hazard - TRAP, used 22 times
- Arctic hazard - BERG, used 17 times
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