Sightlines study

In complex environments, such as crane cabins and ship bridges, where sightlines are essential for the safe and effective execution of the primary operational tasks, the available field of vision determines to a large degree the performance of users and the safety of the operation.

HTDS is specialized in designing complex human-machine interactions. In the design phase, the field of vision always follows from other design choices made on the basis of technical and/or safety requirements and preconditions. Crane operators often sit too far forward than is healthy. Crewmen on a bridge often find their sightlines blocked by window frames and reflections in glass. This leads to unsafe situations for people and materials. HTDS believes that specifications relating to sightlines are as relevant as all the other design requirements and should be factored in at an early stage. HTDS has developed a specific sightlines study for this purpose.

Complex human-machine interactions begin with sightlines

The sightlines study provides insight into the impact of chair and window positions, on field of vision and posture. This study generates a systematic understanding of:

  • Required objects/positions that the operator (crane driver or crew) must have a clear view of. Examples include transfer points, position of deck crew, container or bulk loading progress, bunker positions, view of displays.



  • The priority of these objects/areas on the basis of impact.
  • Realistic user heights to guarantee that the crane or ship's bridge is suitable for at least 90% of the (international or domestic) professional population.
  • Working in a posture that complies with current legislation and regulation and minimizing the probability of physical problems arising.
  • The specification of the operating position, console height and window frame siting in such a way that the main objects in the operator's primary or secondary field of vision are clearly visible.

The sightlines study is a key basis for cabin and ship-bridge design.