Improving Safety of Marine Cable Survey Operation Through Safety Assessment using the Formal Safety Assessment Method (Case Study RV. Baruna Jaya)

Abstract

In the last five years, survey operations for marine cables have become a yearly activity carried out by Indonesia’s Research Vessel. Safety in survey operations is one of the biggest concerns in marine cable route surveys. This paper focuses on handling the survey operation risk and excluding the vessel operation risk. To solve the problem, we need a risk analysis methodology with systematic steps to identify, prioritize, and control risks. The International Maritime Organization’s (IMO) methodology to deal with them is the Formal Safety Assessment (FSA). Firstly, Hazard Identification (HAZID) is used to identify hazards and prioritize Top Events where Towfish Survey Equipment Lost is found as the Highest Top Event with basic events Bad Communication, Fisheries Aggregating Device, Seabed Collision, and Wire & Cable fastening using the Fault Tree Analysis Method as the second step. Determining a Risk Control Option (RCO) based on the Basic Event in the FTA is the third step, of which Mitigation and Prevention will be the highlight. Lastly, RCO will be assessed according to Cost Benefit Assessment (CBA). The results showed that by using Administrative Risk Control Option, we could reduce the probability of survey equipment being lost by 46.55%.

Risk Analysis of Equipment Loss During Marine Survey Operation by Integrating Fault Tree to Bayesian Network

“…The FTA data is already in the form of an 'AND' Gate or 'OR' Gate with flow levels according to qualitative analysis complemented by the frequency of occurrence data that shows probabilities estimation based on quantitative analysis. Both have been done in previous papers [2], so the FT structure's events were translated into the BN structure's nodes, and conditional probabilities in the BN were constructed via logical gates in the FT structure. Following previous research conducted by [4], [5], [7], which proves that FTA can be developed into a BN if it has sufficient data,…”

“…In gas process facilities, the FTA was used to assess the failure [4]. FTA has also been used in marine survey operations to analyse the cause of survey equipment failure [2].…”

“…In This Analysis, FTA was developed in the previous analysis [2], as shown in Figure 3. In Figure 3, the Basic events represented as a circle illustrate the root cause of the "Survey Equipment Loss" top event.…”

“…To date, two studies related to safety assessment have been found in marine survey operations. Several authors used FTA (Fault Tree Analysis) to investigate and analyse the most critical risks of seismic survey operations [1] and utilise FTA to improve the Safety of Marine Cable Survey Operations [2].…”