---
kind: "section"
citation: "46 C.F.R. § 197.458"
title: "46"
number: "197.458"
heading: "Gages and timekeeping devices."
url: "https://uscodex.org/cfr/46/197.458"
---

# §197.458. Gages and timekeeping devices.


The diving supervisor shall insure that—

- (a) Each depth gage and timekeeping device is tested or calibrated against a master reference gage or time-keeping device every 6 months;
- (b) A depth gage is tested when a discrepancy exists in a depth gage reading greater than 2 percent of full scale between any two gages of similar range and calibration;
- (c) A timekeeping device is tested when a discrepancy exists in a timekeeping device reading greater than one-quarter of a minute in a 4-hour period between any two timekeeping devices; and
- (d) **Each depth gage and timekeeping device is inspected before diving operations are begun.**

## Notes

### Authority

Authority: 33 U.S.C. 1509; 43 U.S.C. 1333; 46 U.S.C. 3306, 3703, 6101; Department of Homeland Security Delegation No. 0170.1.

### Source

Source: CGD 76-009, 43 FR 53683, Nov. 16, 1978, unless otherwise noted.