Maritime situational awareness

One of the critical competencies a seafarer needs is situational awareness, being alert to his or her environment and being able to analyze the situation and make informed decisions.

A formal definition:

The term situational awareness can be defined as how elements are viewed within their surroundings, relative to time and space, and how to foresee or predict the occurrence of events by understanding trends and patterns.[1]

Lack of this competence can lead to navigational errors that can be disastrous.

A survey of practising seafarers using a bridge simulator found that over 50% of them failed to recognise a navigational fault even when there were audio and visual cues[2].

A report by the Norwegian Maritime safety authority into a recent collision between a Norwegian warship and a tanker off the Norwegian coast had several safety recommendations. One of these (Marine No 2019/06T) stated:

«The navigator in charge did not pick up on the signals of danger or that the navigator’s own situational awareness was inaccurate. A more experienced navigator would have been better equipped to realise this. »[3]

 

So what is situational awareness? Let’s use a deck officer on watch as an example.

Many scholars break it down into three levels in sequence.

1.      The perception of the elements in the current environment means that a navigator can identify ships and objects around him or her, can identify alarms or signals on the bridge.

2.      Comprehension of the situation meaning that the navigator understands the situation and the likely risks involved.

3.      A decision-making phase where the navigator acts in response to the perceived risk.

An example helps clarify the principles.

It is nighttime and the navigator is in maritime traffic and identifies a ship approaching. Either by radar or visually he ascertains that there is the likelihood of a collision. The classic «end on» scenario. Once understood it is the navigator’s responsibility to make a decision following the International Collision regulations and alter course to starboard to avoid the oncoming vessel. That way the risk of a collision is averted.

This is a simplified version and there can be many factors that can make the situation more complex such as limited manoeuvrability, fatigue or lack of competence of the navigator. Nevertheless situational awareness practice is central to the operation and inability to understand what is happening around the navigator is a major cause of human error accidents at sea.

The navigator is not always alone on the ridge but works in a team utilising the tools of bridge resource management where situational awareness is a key component.

[4]There is another dimension to situational awareness that should not be discounted. Ones senses. It may be that as Captain in your cabin on an ocean crossing you hear a change in the background noise of engine, wind and waves. This alerts to a new situation, either planned or not. The change in motion of the ship would be another source of concern. Differentiating the sound of one alarm from another can be critical in decision-making.

So the senses also play an important role in situational awareness.

 

References

‘2019-08 KNM Helge Ingstad Og Sola TS Eng (1).Pdf’, n.d.

Chan, Jevon P., Rose Norman, Kayvan Pazouki, and David Golightly. ‘Autonomous Maritime Operations and the Influence of Situational Awareness within Maritime Navigation’. WMU Journal of Maritime Affairs 21, no. 2 (1 June 2022): 121–40. https://doi.org/10.1007/s13437-022-00264-4.

Knudsen, Anne. ‘Bridge Resource Management (BRM/MRM) | Definition’. NaviMinds (blog), 6 December 2023. https://naviminds.com/bridge-resource-management/.

 

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[1] Chan et al., ‘Autonomous Maritime Operations and the Influence of Situational Awareness within Maritime Navigation’, 4.

[2] Chan et al., page 138.

[3] ‘2019-08 KNM Helge Ingstad Og Sola TS Eng (page 148).Pdf’.

[4] Knudsen, ‘Bridge Resource Management (BRM/MRM) | Definition’.