Question

(ii) In what ways is a bulk tanker for iron-ore like the oil tanker ?​

Answer 1

The name itself says that they carry products in bulk quantities. Ex: Edible commodities, raw materials and finished steel products. Bulk carriers can be with or without cargo gear. Those without will use the shore gear for cargo operations. The construction will be usually single or double hull with DB’s and TST’s. & Side hopper tanks. During rough weathers the ballast is taken into the cargo hold so that CG comes down there by minimizing the stresses. Cargo grabs can enter easily due to wide opening of cargo hold. The excessive cutting area reduces deck strength, but suitably compensated with the hatch coaming structure. Pontoons will cover the cargo hold & will differ in size, shape and operation depends on manufacturer. Pillars with deck girders supported by brackets and beams will take the weight of pontoons. The tanks tops are strong enough to bear stress caused by bulldozers or bob cats when they operate to collect cargo in cargo holds

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Answer 2

Answer:

OBO-carriers are today not as common as they were in the 1970-1980s. This is due to investors seeking assets that are easily valued, whilst the value of the OBO is only appreciated by those operating them. With few of them being ordered after the 1980s, most are time-expired and no longer exist. Some ship-owners continued to support the OBO-concept and its trading flexibility. SKS,[3] part of the Kristian Gerhard Jebsen Group, is today operating the largest OBO-fleet in the world consisting of 10 OBO carriers. The latest obo-vessel in the fleet, D Whale, was delivered from Hyundai Heavy Industries.[4] The design of these vessels has been significantly improved compared to the vessels made in the seventies and all problems which were related to the OBO-concept - including many that were common amongst tankers at that time - have been dealt with.