USCG Exam PracticeApplying tide corrections to charted depth
A vessel's tide tables are the current edition but her charts have not been corrected with the most recent NGA Notices to Mariners applicable to the transit. Under 33 CFR §164.33, which statement is correct?
- A. The vessel is in compliance because tide tables are current, satisfying the publication requirement.
- ✓ The vessel is not in compliance because charts must be currently corrected per the NGA Notices to Mariners reasonably available and applicable to the transit.Correct
- C. The vessel is in compliance if the uncorrected chart is of a large enough scale, since scale is the primary requirement.
- D. The vessel is in compliance because 33 CFR §164.33 only requires current editions of tide tables, not currently corrected charts.
Why B is correct
33 CFR §164.33(a)(1)(ii) requires charts to be currently corrected, and §164.33(c) defines 'currently corrected' as incorporating all applicable NGA Notices to Mariners reasonably available to the vessel. Currency of tide tables is a separate, additional requirement and does not substitute for chart correction compliance.
Cited:33 CFR §164.33