# Grant Island

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Island in Marie Byrd Land, Antarctica

This article is about the island in Marie Byrd Land, Antarctica. For the island in British Columbia's Okanagan Lake, see [Grant Island (Okanagan Lake)](/source/Grant_Island_(Okanagan_Lake)).

Grant Island Map of Grant Island Grant Island Location in Antarctica Geography Location Antarctica Coordinates 74°28′S 131°35′W / 74.467°S 131.583°W / -74.467; -131.583 (Grant Island) Area 703 km2 (271 sq mi) Length 37 km (23 mi) Width 19 km (11.8 mi) Administration Administered under the Antarctic Treaty System Demographics Population Uninhabited

**Grant Island** ([74°28′S 131°35′W / 74.467°S 131.583°W / -74.467; -131.583 (Grant Island)](https://geohack.toolforge.org/geohack.php?pagename=Grant_Island&params=74_28_S_131_35_W_&title=Grant+Island)) is an ice-covered island, 20 nautical miles (37 km; 23 mi) long and 10 nautical miles (19 km; 12 mi) wide, lying 5 nautical miles (9.3 km; 5.8 mi) east of the smaller [Shepard Island](/source/Shepard_Island) off the coast of [Marie Byrd Land](/source/Marie_Byrd_Land), [Antarctica](/source/Antarctica). Like [Shepard Island](/source/Shepard_Island), Grant Island is surrounded by the [Getz Ice Shelf](/source/Getz_Ice_Shelf) on all but the north side.[1]

## Location

**Map all coordinates using** [OpenStreetMap](https://tools.wmflabs.org/osm4wiki/cgi-bin/wiki/wiki-osm.pl?project=en&article=Grant_Island)

**Download coordinates as:**

- [KML](https://tools.wmflabs.org/kmlexport?article=Grant_Island)

- [GPX (all coordinates)](https://geoexport.toolforge.org/gpx?project=en.wikipedia.org&coprimary=all&titles=Grant_Island)

- [GPX (primary coordinates)](https://geoexport.toolforge.org/gpx?project=en.wikipedia.org&coprimary=primary&titles=Grant_Island)

- [GPX (secondary coordinates)](https://geoexport.toolforge.org/gpx?project=en.wikipedia.org&coprimary=secondary&titles=Grant_Island)

Shepard Island in center of map

Grant Island is in the north, seaward edge of the [Getz Ice Shelf](/source/Getz_Ice_Shelf). Reynolds Strait is on its north side, which is indented by Ledda Bay, and separates it from Forrester Island. [Shepard Island](/source/Shepard_Island) is to the west. Features, from west to east, include Brookman Point, Mount Obiglio, Mount Hummel and McCarthy Point.[2]

## Discovery and name

Grant Island was discovered and charted by personnel aboard [USS *Glacier*](/source/USS_Glacier_(AGB-4)) on February 4, 1962. It was named by the United States [Advisory Committee on Antarctic Names](/source/Advisory_Committee_on_Antarctic_Names) (US-ACAN) for Commander E. G. Grant, Commanding Officer of USS *Glacier* at the time of discovery.[1]

## Features and nearby features

### Brookman Point

[74°19′S 131°51′W / 74.317°S 131.850°W / -74.317; -131.850](https://geohack.toolforge.org/geohack.php?pagename=Grant_Island&params=74_19_S_131_51_W_). The snow-covered northwest point of Grant Island. Discovered and first charted from the USS *Glacier* (Captain Edwin A. McDonald, [United States Navy](/source/United_States_Navy)) in February 1962. Named by US-ACAN for Lieutenant Peter J. Brookman, CEC, United States Navy, Officer-in-Charge at Byrd Station, 1970.[3]

### Mount Obiglio

Main article: [Mount Obiglio](/source/Mount_Obiglio)

[74°27′S 131°50′W / 74.450°S 131.833°W / -74.450; -131.833](https://geohack.toolforge.org/geohack.php?pagename=Grant_Island&params=74_27_S_131_50_W_). A moderate rock summit 510 metres (1,670 ft) high in the west-central portion of Grant Island. Discovered and charted from the USS *Glacier* on February 4, 1962 during [Operation Deep Freeze](/source/Operation_Deep_Freeze) 1961-62. Named by US-ACAN for Lieutenant G.M. Obiglio, Argentine naval observer aboard the *Glacier*, at the suggestion of the Task Unit Commander, Captain Edwin A. McDonald, United States Navy.[4]

### Mount Hummel

[74°28′S 131°19′W / 74.467°S 131.317°W / -74.467; -131.317](https://geohack.toolforge.org/geohack.php?pagename=Grant_Island&params=74_28_S_131_19_W_). A snow-capped summit that rises above the east-central portion of Grant Island. Discovered and first charted from the USS *Glacier* on February 4, 1962. Named by US-ACAN for Lieutenant (j.g.) William T. Hummel, [United States Navy Reserve](/source/United_States_Navy_Reserve), helicopter pilot aboard Glacier at the time of discovery.[5]

### McCarthy Point

[74°25′S 130°59′W / 74.417°S 130.983°W / -74.417; -130.983](https://geohack.toolforge.org/geohack.php?pagename=Grant_Island&params=74_25_S_130_59_W_). An ice-covered point that marks the northeast extremity of Grant Island. Discovered and charted from the USS *Glacier* on February 4, 1962. Named by US-ACAN for Lieutenant (j-g.) J.F. McCarthy, United States Navy, Disbursing Officer on the *Glacier* at the time of discovery.[6]

### Reynolds Strait

[74°15′S 132°10′W / 74.250°S 132.167°W / -74.250; -132.167](https://geohack.toolforge.org/geohack.php?pagename=Grant_Island&params=74_15_S_132_10_W_). A strait between Forrester Island on the north and Shepard Island and Grant Island along the edge of Getz Ice Shelf on the south. The discovery of Forrester Island from USS *Glacier* on February 4, 1962 simultaneously established the existence of the strait, which was then sounded. The name was applied by US-ACAN for Ralph R. Reynolds (1938-73), Lieutenant Commander, CEC, United States Navy who was Officer-inCharge of the Navy Nuclear Power Unit at [McMurdo Station](/source/McMurdo_Station) in 1970.[7]

### Ledda Bay

[74°23′S 131°20′W / 74.383°S 131.333°W / -74.383; -131.333](https://geohack.toolforge.org/geohack.php?pagename=Grant_Island&params=74_23_S_131_20_W_). A shallow embayment or bight, 12 nautical miles (22 km; 14 mi) long, in the north side of Grant Island. Discovered and first charted from the USS *Glacier* on February 4, 1962. Named for R.J. Ledda, QM3, United States Navy, quartermaster aboard the *Glacier* on the cruise in which the bay was discovered.[8]

### Forrester Island

[74°09′S 132°13′W / 74.150°S 132.217°W / -74.150; -132.217](https://geohack.toolforge.org/geohack.php?pagename=Grant_Island&params=74_09_S_132_13_W_). An ice-capped island 3.5 nautical miles (6.5 km; 4.0 mi) long that lies 13 nautical miles (24 km; 15 mi) north-northeast of Shepard Island, off the Getz Ice Shelf. The island was discovered and charted from the USS Glacier on February 5, 1962. Named by US-ACAN after Lieutenant Commander John J. Forrester, United States Navy, Executive Officer aboard Glacier at the time of discovery.[9]

## References

1. ^ [***a***](#cite_ref-FOOTNOTEAlberts1995291_1-0) [***b***](#cite_ref-FOOTNOTEAlberts1995291_1-1) [Alberts 1995](#CITEREFAlberts1995), p. 291.

1. **[^](#cite_ref-FOOTNOTEGrant_Island_USGS_2-0)** [Grant Island USGS](#CITEREFGrant_Island_USGS).

1. **[^](#cite_ref-FOOTNOTEAlberts199596_3-0)** [Alberts 1995](#CITEREFAlberts1995), p. 96.

1. **[^](#cite_ref-FOOTNOTEAlberts1995537_4-0)** [Alberts 1995](#CITEREFAlberts1995), p. 537.

1. **[^](#cite_ref-FOOTNOTEAlberts1995354_5-0)** [Alberts 1995](#CITEREFAlberts1995), p. 354.

1. **[^](#cite_ref-FOOTNOTEAlberts1995473_6-0)** [Alberts 1995](#CITEREFAlberts1995), p. 473.

1. **[^](#cite_ref-FOOTNOTEAlberts1995615_7-0)** [Alberts 1995](#CITEREFAlberts1995), p. 615.

1. **[^](#cite_ref-FOOTNOTEAlberts1995525_8-0)** [Alberts 1995](#CITEREFAlberts1995), p. 525.

1. **[^](#cite_ref-FOOTNOTEAlberts1995252_9-0)** [Alberts 1995](#CITEREFAlberts1995), p. 252.

## Sources

- Alberts, Fred G., ed. (1995), [*Geographic Names of the Antarctic*](https://pubs.usgs.gov/fedgov/70039167/report.pdf) (PDF) (2 ed.), United States Board on Geographic Names, retrieved 2023-12-03 This article incorporates [public domain material](/source/Copyright_status_of_works_by_the_federal_government_of_the_United_States) from websites or documents of the [United States Board on Geographic Names](/source/United_States_Board_on_Geographic_Names).

- [*Grant Island*](https://commons.wikimedia.org/wiki/File:C74130s5_Ant.Map_Grant_Island.jpg), USGS: United States Geological Survey, retrieved 2024-04-06{{[citation](https://en.wikipedia.org/wiki/Template:Citation)}}: CS1 maint: publisher location ([link](https://en.wikipedia.org/wiki/Category:CS1_maint:_publisher_location))

- This article incorporates [public domain material](/source/Copyright_status_of_works_by_the_federal_government_of_the_United_States) from websites or documents of the [United States Geological Survey](/source/United_States_Geological_Survey).

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