The folder contains four sheets, accumulated by the Humber Conservancy Board, detailing the lanterns in use on lightvessels off Burma and India:

Burma and Buragua Flats Lightvessels

1. General Arrangement for Triple Flash 5th Order Revolving Optic. Scale: 3 inches to 1 foot [1:4]. Drawing No. D44300 (3 January 1952).

2. Arrangement of Murette for Lightvessel Lantern. Scale: Chance Brothers Limited. Drawing No. M44422.

Calcutta 'Flame' Lightvessel | The Commissioners of the Port of Calcutta [Kolkata]

1. General Arrangement of 4th Order Revolving Optic and Pendular Gear in Lightvessel Lantern. Scale: ½ inch and 1½ inch to 1 foot [1:24 and 1:8]. Stone-Chance Brothers Limited. Drawing No. M. 45198 (3 December 1954).

2. General Arrangement of Lantern Apparatus. Scale: ½ inch and 1½ inch to 1 foot [1:24 and 1:8]. Drawing No. 45344. (6 December 1955).

Iranian Service Vessel

1. 117'-0 B.P. Service Vessel got Government of Iran (Sheet 2). Brooke Marine Limited. Drawing No. E. 1148 A. 2 (April 1962)