33 CFR § 167.401 - Off San Francisco: Precautionary area.

---
identifier: "/us/cfr/t33/s167.401"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "33 CFR § 167.401 - Off San Francisco: Precautionary area."
title_number: 33
title_name: "Navigation and Navigable Waters"
section_number: "167.401"
section_name: "Off San Francisco: Precautionary area."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "P"
subchapter_name: "PORTS AND WATERWAYS SAFETY"
part_number: "167"
part_name: "OFFSHORE TRAFFIC SEPARATION SCHEMES"
positive_law: false
currency: "2026-04-05"
last_updated: "2026-04-05"
format_version: "1.1.0"
generator: "[email protected]"
authority: "46 U.S.C. 70001, 70003; Department of Homeland Security Delegation No. 0170.0."
regulatory_source: "CGD 81-080, 48 FR 36456, Aug. 11, 1983, unless otherwise noted."
cfr_part: "167"
---


# 167.401 Off San Francisco: Precautionary area.

(a)(1) A precautionary area is established bounded to the west by an arc of a circle with a radius of 6 miles centering upon geographical position 37°45.00′ N, 122°41.50′ W and connecting the following geographical positions:

| Latitude | Longitude |
| --- | --- |
| 37°42.70′ N | 122°34.60′ W. |
| 37°50.30′ N | 122°38.00′ W. |

(2) The precautionary area is bounded to the east by a line connecting the following geographic positions:

| Latitude | Longitude |
| --- | --- |
| 37°42.70′ N | 122°34.60′ W. |
| 37°45.90′ N | 122°38.00′ W. |
| 37°50.30′ N | 122°38.00′ W |

(b) A pilot boarding area is located near the center of the precautionary area described in paragraph (a) of this section. Due to heavy vessel traffic, mariners are advised not to anchor or linger in this precautionary area except to pick up or disembark a pilot.