SVN solovelanet: rivista digitale dedicata al mondo della vela. Articoli di navigazione, di nautica e barche a vela
Issue link: http://svn.uberflip.com/i/1250934
75 SVN Solovelanet Global The related cost cannot be borne entirely by the latter, because the repaired hull will be in better condition than it would have been if the boat had never had osmosis. 3) Damage caused by stranding: stranding may cause different sorts of damage depending on how it occurred. Damage may be concentrated in the bulb and in the surrounding hull portion if the struck rock was submerged enough to be impacted by the bulb only, or in the hull if the rock was surfacing, or at most in both areas. The impact speed is a key factor in assessing da- mage caused by stranding on rocks. A hint that the boat may have suffered stranding damage is given by a dent on the bulb or by its repair, but the surveyor is not going to stop there and will analyse the state of the hull just before and im- mediately after the bulb. In fact, in the event of a collision, the bulb levers and compresses the front area, pulling the area in the back. In cases of minor impacts, small transverse cracks can usually be seen in the affected hull portions. The possible consequences of stranding range from none, as happens in most cases, to seve- re damage, compromising the structures of the boat. Such accidents may even cause the bre- akdown of floor boards and stringers, or a proper leak.The assessment of such damage must be left to the discretion and professionalism of the surveyor, the only one that, upon survey, will be able to assess whether the integrity of the boat has been affected or not. 4) Damage caused by grounding on sand: as mentioned before, grounding on sand causes severe damage only if it occurs in particular cir- cumstances. Grounding on a sandbank at 3 knots may cause people on deck to fall, but will hardly damage the boat. Things are different if the boat tries to enter a river when there is a bar, and hits the seabed violently while falling into the trough of a wave. In this case, a recoil of the bulb may occur which can damage the surrounding structures. Here too, finding and assessing damage is the sur- veyor's task. 5) Collision damage: severe collision damage Anyone may happen to hit rocks, as shown in the photo on top.The gentleman wearing the red jacket and sitting on the boat stuck on a rock is Dennis Conner, the legend of the America's Cup. Following, a boat stuck on rocks in a far more dangerous situation. In the third picture, a boat on a sandbank. Here above, a collision between boats, the powerboat hit the sailboat at high speed and sank after the collision. The sailboat, hit at a bulkhead, lost the mast but suffered moderate damage to the hull.