The Nigerian Navy over the decade develop expertise and embarked on design/building of ship and craft. With the present class of the Seaward Defence Boat (SDB3) which is a 43m steel vessel, a shift from aluminium to steel, therefore, the need for critical thinking in terms of Naval architectural design unlike what is common in this region of having ships made of Glass Reinforced Plastic and Aluminium. The research of being all steel vessel was particularly critical now because the SDB3 is the largest of the series and meant to be the best judging by what her roles are supposed to be. Most of her resources are steel, generated at NDL. The Hull is already completed and advancing into the outfitting stage with most of the outfitting equipment on ground. SDB3 is going to be quite appealing with sophisticated trappings.