USCG Exam PracticeChart symbols and abbreviations (Chart No. 1)
On a US nautical chart, the letter code 'M' annotated near an anchorage symbol indicates what bottom characteristic?
- ✓ MudCorrect
- B. Marl
- C. Mixed
- D. Mussels
Why A is correct
Chart bottom type codes use 'M' to denote mud. This information is used to assess holding ground quality when anchoring. Other codes such as S (sand), R (rock), and Co (coral) follow the same convention.