33 CFR § 167.76 - In the approach to Boston, MA: Precautionary areas.

---
identifier: "/us/cfr/t33/s167.76"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "33 CFR § 167.76 - In the approach to Boston, MA: Precautionary areas."
title_number: 33
title_name: "Navigation and Navigable Waters"
section_number: "167.76"
section_name: "In the approach to Boston, MA: Precautionary areas."
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: "2026-03-24"
last_updated: "2026-03-24"
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"
---


# 167.76 In the approach to Boston, MA: Precautionary areas.

(a) A precautionary area is established with a radius of 6.17 nautical miles centered upon geographical position 42°22.71′ N, 70°46.97′ W.

(b) (1) A precautionary area is established and is bounded to the east by a circle of radius 15.5 miles, centered upon geographical position 40°35.01′ N, 68°59.96′ W, intersected by the traffic separation schemes in the approach to Boston, MA, and Eastern approach, off Nantucket (part II of the TSS off New York) at the following geographical positions:

| Latitude | Longitude |
| --- | --- |
| 40°50.47′ N | 68°58.67′ W. |
| 40°23.75′ N | 69°13.95′ W. |

(2) The precautionary area is bounded to the west by a line connecting the two TSSs between the following geographical positions:

| Latitude | Longitude |
| --- | --- |
| 40°48.03′ N | 69°02.95′ W. |
| 40°36.76′ N | 69°15.13′ W. |

[USCG-2010-0718, 75 FR 77534, Dec. 13, 2010]