Page 40 - Sayı-08

38 A. M. YASA and H. AKYILDIZ

At this point, the potential hazards are to be identified. For this identification, historical data,
marine investigation reports, flag state information and other relevant reports have been checked.
Many accident information and their detailed data for ship specific information have been taken
from National Transportation Safety Board (NTSB) website [11].

Fig. 4. Distribution of ships involved in a casualty with another ship

When the historical data has been checked for last several years, it is clear that the biggest accident
type is collision/contact/allision. There also many fire/explosion cases, as well as capsizing,
sinking and machinery failure incident too. Generally, following hazards have been defined.
1. Contact/Collision/Allision
2. Fire and/or Explosion
3. Grounding and/or Stranding
4. Flooding
5. Capsizing
6. Machinery Failure/Equipment Damage
7. Human Related Hazards (Electric Shock etc., Lifting Accidents etc.)
8. Material Failure
9. Others
At this paper, we have focusing on above Item No. 1 and No. 2. The reason is this selection is the
identification of hazards of Offshore Support Vessels. As mentioned above, many accident/hazard
types are collision.
As it can be seen that in the recent years, there are many hazards for collision/allusion. Also,
Fire/Explosion is having very big numbers too especially when it depends on human error or
machinery failure. Considering these damage and hazard types, as mentioned above, on this paper
these two types of hazards are focused. After identification of hazards and as well as focusing
area, it is time to sort the large amount of information to an accident sub-categories as follows.
1. Collision/Contact/Allision Sub-Categories

 Equipment/Machinery Failure (Air leak, power failure etc.)
 Weather Effects (Heavy swell, strong wind, fog etc.)
 Maneuvering Failure (Loss of steering, navigational equipment failure etc.)

GiDB|DERGi Sayı 8, 2017