Launch or test range

WESTERN RANGE OP

Recorded as: WESTERN RANGE OP

The name suggests a launch or test range; seahazards has not verified who this issuer is. What follows is what the messages recorded under this name show.

Launch and test ranges announce the sea areas that may be dangerous during a rocket launch, a missile test or the recovery of spent stages: where parts may fall, and in which time windows. Their warnings are among the most precisely defined in the archive — polygons with start and end times that cancel themselves when the last window closes.

What the archive holds

198 messages in this archive record WESTERN RANGE OP as their authority, issued from 2005-05-03 to 2016-11-06. None of them is in force in the latest lists we collected.

Exercises accounts for 96 of 198 recorded messages (48%), the largest warning type group in this selection.

All of those that can be attributed to a NAVAREA belong to NAVAREA XII.

Located messages lie in 3 sea areas, most often North Pacific Ocean, South Pacific Ocean and Indian Ocean.

The largest yearly count is 2010, with 32 messages.

Across all years its messages are issued most often in February and least often in October.

They reached this archive through NAVAREA XII (143) and HYDROPAC (55).

Messages by year of issue

'05

'06

'07

'08

'09

'10

'11

'12

'13

'14

'15

'16

By month of issue, all years

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Warning types

Where

NAVAREA XII 143

Most recently issued

Earliest in the archive

NAVAREA XII 138/05 · Exercises · North Pacific Ocean2005-05-02
Hazardous operations 0801Z to 1401Z daily 05 thru 07 may in areas bound by: a. 34-50N 121-03W, 34-52N…

Other launch or test ranges in NAVAREA XII

Counts are messages recording this issuer as their authority, recounted 2026-09-24; see coverage for what is collected. Not for navigation.