A detailed watercolour by Eric Ravilious depicting a diver preparing for a descent at the HMS Dolphin submarine base during the Second World War.

Eric Ravilious produced this work while serving as an official war artist during the Second World War. The composition captures a moment of preparation within the HMS Dolphin submarine base. A diver, encased in a heavy, yellow suit, sits on a bench while attendants assist with his equipment. The scene is defined by the artist's characteristic use of cross-hatching and a controlled, muted palette, which lends a sense of stillness to the industrial environment.

The background features a large, textured wall marked with Roman numerals, suggesting a depth gauge or a similar technical apparatus. This grid-like structure provides a geometric counterpoint to the organic forms of the figures. Ravilious employs a high vantage point, a technique he often used to organise complex spaces into clear, readable arrangements. The ladders, one leaning against the wall and another positioned in the foreground, create a sense of verticality and structural order.

This piece demonstrates the artist's interest in the intersection of human activity and mechanical environments. Rather than focusing on the chaos of conflict, Ravilious documents the technical procedures and the quiet, methodical nature of naval life. His approach to watercolour, often involving layers of fine lines and stippling, creates a distinct surface quality that mimics the precision of printmaking. The work remains a clear example of his ability to find order and visual interest in the mundane aspects of wartime service. The yellow of the diving suit provides a singular point of colour, drawing the eye directly to the central subject amidst the surrounding grey and brown tones of the submarine interior.