The documents available to me only cover events up to July 21; other ships may have joined from (or left at) other ports later on. Please scroll down to the bottom of this page for possible, additional ships.

Commodore C. B. Osborne, R.N.R. was in the Norwegian Høegh Silverlight, Vice Commodore was Captain Fitzimmons? in the American James Monroe as far as Augusta? Later Vice Commodore was in Esso Baltimore?

Average speed: 8.68 knots.

For info, some of the ships in this convoy had previously arrived with Convoy UGS 45.

From Port Said:
Unfortunately, list of ships present from Port Said is not included in the convoy document. What follows is a list of ships said to have departed Port Said on July 14-1944, received from Tony Cooper, England.

For the U.S. (or Canada):
James Monroe - arrived Cape Henry Aug. 8-1944
Clement Clay - voyage from Bandar Shapur, arrived Cape Henry Aug. 8-1944
Thomas L. Clingman - voyage from Busreh, arrived New York Aug. 8-1944
Thomas Nuttall - voyage from Khorram Shahr, arrived New York Aug. 8-1944
Francis N. Blanchet - voyage from Calcutta, arrived Portland Aug. 8-1944
James D. Trask - arrived Cape Henry Aug. 8-1944
William Patterson - voyage from Abadan, arrived New York Aug. 8-1944. (At 09:55B July 19 a case of suspected Appendicitis was transferred from William Patterson to HMS Hazard for transport to Malta).
Henry Bacon - voyage from Khorram Shahr, arrived Cape Henry Aug. 8-1944
Høegh Silverlight - voyage from Cochin, arrived New York Aug. 8-1944
Robert Luckenbach - voyage from Bandar Shapur, arrived Cape Henry Aug. 8-1944
Ben F. Dixon - voyage from Khorram Shahr, arrived New York Aug. 8-1944
Nonsuco - voyage from Abadan, arrived New York Aug. 8-1944
William Coddington - voyage from Busreh, arrived Cape Henry Aug. 8-1944
Charles Scribner - voyage from Khorram Shahr, arrived Cape Henry Aug. 8-1944
Jacob Perkins - voyage from Bandar Shapur, arrived Cape Henry Aug. 8-1944
George Chaffey - voyage from Calcutta, arrived Cape Henry Aug. 8-1944
Ole Bull - voyage from Khorram Shahr, arrived Cape Henry Aug. 8-1944
Algonquin Park - voyage from Calcutta for Canada

Also leaving Port Said that day:
Gulfpoint - voyage from Abadan (parted company at Bizerta, see below)
Elise (assuming this was the Norwegian Elise) - voyage from Abadan, for Augustsa / Naples - parted company at Augusta.
Clan Macaulay - voyage from Brisbane, for Augusta / Naples - parted company at Augusta
Joseph Francis - voyage from Lourenco Marques, for Naples - parted company at Augusta

These also left Port Said on July 14-1944 (but I'm not entirely sure they were in this convoy):
Samhorn - voyage from Lourenco Marques, for Gibraltar.
Samida - voyage from Karachi, for Port Said / Alexandria
Straat Soenda - voyage from Cochin, for Gibraltar / U.K.

The Commodore mentions Raymond T. Baker in his notes for GUS 46, but she returned to Port Said with engine trouble on July 14.

The following 5 joined from Alexandria at 12:00C on July 15:
Charles Bulfinch - arrived Cape Henry Aug. 8-1944
Changte - later parted company for Malta, see below
Empire Airman - voyage from Abadan, parted company off Augusta, see below
F. T. 13 - later left at 10:15C July 17 (at Benghazi), in position 33 13N 21 56E to land a sick man.
Tobruk - for Naples / Augusta - parted company at Augusta

At 08:00B on July 19 in 36 20N 15 19E the following joined from Augusta:

For the U.S.:
Esso Baltimore - arrived Cape Henry Aug. 8-1944
Tide Water Associated - arrived New York Aug. 8-1944
Valldemosa - arrived New York Aug. 8-1944
William M. Stewart - arrived Cape Henry Aug. 8-1944
Longwood - detached at 19:00B July 19 in order to pick up the U.S. Commodore at Bizerta, position 36 39N 13 30E, rejoined from Bizerta July 20. Arrived New York Aug. 8-1944
Clausina - arrived New York Aug. 8-1944
Norheim - arrived New York Aug. 8-1944
Norholm - arrived New York Aug. 8-1944

For Casablanca / U.S.:
George K. Fitch - arrived Cape Henry Aug. 8-1944
Franz Klasen - see next convoy, GUS 47.

For Oran:
James Manning
Moses Austin
King S. Woolsey
James Jackson
George F. Patten (parted company at Bizerta, see below)
Tristram Dalton
Paine Wingate
Roald Amundsen
Francis Marion (listed as Francis Lampion in the convoy document)

For Algiers:
Fort Columbia
Cape Howe
Empire Grange
Ocean Faith

while these 5 left at 07:00B in 36 17N 15 27E:
Empire Airman, Elise, Clan Macauley, Joseph Francis and Tobruk.

At Malta, these joined at 13:00B July 19, 36 27N 14 31E:
British Power - for Algiers
Cochrane - for Casablanca / Hampton Roads, see GUS 47.

Changte left.

During the night of July 20/21
Thomas Stone joined from Tunis - arrived Cape Henry Aug. 8-1944

The following joined from Bizerta on July 20:

For the U.S.:
Empire Bombardier - arrived New York Aug. 8-1944
Nassarius - arrived New York Aug. 8-1944
Dwight L. Moody - arrived New York Aug. 8-1944
(and Longwood, which had been detached to pick up the U.S. Commodore)

Crosby S. Noyes - for Oran
Mattaponi
Mirabeau B. Lamar
HMS Guardian

The following ships also left Bizerta on July 20 (but not listed in convoy document):
Zaan and Hjalmar Wessel (for Bone), Corfell, Chloris, Clydebank and Langano (all for Cagliari).

These left for Bizerta at 15:00B that same day, 37 21N 09 59E):
Gulfpoint and George F. Patten.
Note that Gulfpoint is said to have joined Convoy GUS 47 from Bizerta on July 31-1944 and arrived New York Aug. 17.

At 04:00B on July 21 in 37 20N 07 49E, these joined from Bone:
Steel Inventor - arrived Cape Henry Aug. 8-1944
HMT Hengist.

Other ships arriving the U.S at the same time as GUS 46, and may have sailed in this convoy:

Arrived New York on Aug. 8-1944:
Athelchief, Henry Dundas, British Chemist, Jacob Armstrong, and Gallia (all from Naples), Pan Maine (from Casablanca), Fort George (from Bari), while John T. Holt arrived Delaware Capes (from Casablanca) and Fort Frederick (from Oran) arrived Norfolk that same day.

And these ships arrived Cape Henry on Aug. 8-1944:
British Governor and Meyer Lissner (from Algiers), Oscar Underwood, Peter Trimble Rowe and Sherwood Anderson (all from Naples), George P. McKey (from Bari), Fort Frederick (from Oran as mentioned), Hugh M. Smith (also from Oran) George Shiras, Booker T. Washington and Jonathan Edwards (all from Casablanca).

Escorts:
HMS Fleetwood (S.O.) and HMS Anemone joined at Port Said - left at Bizerta.
HMS Coltsfoot and HMS Hazard joined at Alexandria - left at Bizerta.
U.S. escorts are illegible.

From Commodore's Osborne's narrative:
Owing to ships sailing from Port Side in bad order, convoy was not formed up properly until 19:30C on July 14.

Fleetwood carried out a depth charge attack on good echo at 07:50C on July 18 in position 34 11N 12? 34E - no apparent results.

At 13:55C July 18 - received red warning and convoy warned to be ready to repel air attack. A single unidentified plane flew across the bows of the convoy at 15:52C, distant about 4 miles and flying from port to starboard about 50 feet above the water. It was seen to make a wide circle to the Northward and again came in?(words illegible) from port to starboard, ahead of the convoy at 16:01C, position 34 56N 17 29E. This time range was about 3 miles and it was identified as a JU 88, still about 50 feet above the sea. Fire was opened with long range guns but the firing was not particularly brilliant, only about two bursts out of perhaps 20, going anywhere near the plane. Aircraft did not again return and flew off to the northeast. No hostile action was observed to take place on the part of the enemy. White warning was received at 16:25C. Weather fine and clear.

At 19:30B on July 20 U.S. Commodore (Captain Symington, U.S.N.) joined convoy in Longwood off Bizerta (as mentioned above, this ship had previously been detached from convoy to pick him up). American escort relieved British escort.

U.S. Commodore took over command of convoy at 10:45B in position 37 22N 06 44E (estimated).

At 22:12 July 21 - emergency turn to starboard. Resumed course (emergency turn to port) at 23:16B July 22.

Høegh Silverlight detached from convoy at 23:22B on July 22, proceeding to Algiers. Arrived Algiers at 06:50B July 22. Commodore and staff transferred to motor boat and Høegh Silverlight proceeded to rejoin convoy at 07:21B.

Related external links:
Chronological list of GU convoys (with the returning UG convoys).

Liberty Ships - Alphabetical list.

List of Liberty Ships by Hull No. - Includes info on the men for whom the ships were named (from Wikipedia).

Empire Ships - Also has a listing of the "Sam"-ships, ex Liberty Ships that came under the British flag (and other Liberty ships).

Fort, Ocean & Park Ships