Visje

The "Fort" vessel in the background bears the funnel markings of McCowen & Gross Ltd, of London, and these were very dark yellow (not really orange), with black MG and black top. This company, which in the 1950s became O. Gross & Co Ltd, managed for the British Ministry of Transport six of this type of vessel at various times up to 1950.
They were all standard vessels built in Canada during the Second World War, as follows
Fort Dease Lake (1943, 7150 grt), sold 1948 and renamed Ivor Jenny
Fort Slave (1942, 7134), transferred to USMC 1948 and entered Reserve Fleet
Fort Nisqually (1942, 7132, sold 1950 and renamed Kingsmount
Fort Buffalo (1943, 7133), sold 1950 and renamed Radnor
Fort Dauphin (1943, 7133), sold 1950 and renamed Warkworth
For la Cloche (1944, 7151), sold 1950 and renamed Akti Hill

It would obviously be very helpful if the port in which the photograph was taken could be identified, and should you eventually determine that, you might find the following vessel movements of interest. These are the only reports that I have found on my files.

Fort Dease Lake
Left Geelong 17.6.48, left Durban 3.8.48, arrived Liverpool 6.9.48; as Ivor Jenny was at Birkenhead in 10.48 following sale
Fort Slave
Left Antwerp 17.11.45 for London, arrived 18.11.45
Fort Nisqually
Left Glasgow 15.11.45 for St John, New Brunswick
At London 1.48
Fort Buffalo
Left Fremantle 10.9.48 for Sfax
At Cardiff in 11.48
Left Emden 16.4.49, left Aden 25.5.49, for Saigon
Left Melbourne 6.2.50, left Colombo 12.3.50, for Egypt
Fort Dauphin
Left Aden 28.10.48 for Calcutta
At Alexandria in 3.49
Left Fremantle 13.5.49 for Wallaroo and Adelaide
Left Mauritius 10.1.50 for Liverpool, arrived 19.5.50
Fort la Cloche
At Calcutta in 3.48
Left Port Lincoln 18.9.48 for Busreh, arrived 27.10.48
Left London 14.5.49, ar Gibraltar 19.5.49, for Bombay and Karachi
Left Port Okha 22.12.49 for Lagos, arrived 28.2.50

Regret cannot be more helpful.

Good luck in your searches.

Regards

Roger