- Hull Roughness Analyser
- Computer is connected to the hand held carriage having a stylus measuring head.
- Stylus head is moved around the hull surface to measure and record the hull roughness profile.
- One traverse of the head at any point on the hull will collect information from 10 samples having length of 50 mm.
- For each 50 mm sample, the micro processor will assess the mean gradient through the peaks and valleys to give highest peak to lowest valley measurement for that sample.
- This measurement is known as Rt (50).
- Approx. 100 selected locations which must include bow, stern, mid ship, and boot topping area (area between load line and ballast water line).
- A number of traverses for stylus will give ‘n’ readings, hence the Mean Hull Roughness (M.H.R) at that station is average of Rt (50)
- There will be ‘m’ stations around the hull of the ship. Hence Average Hull Roughness (AHR) will be average of Mean Hull Roughnes
Interlocks are provided so that the engine can be started or reversed only when certain conditions have been fulfilled. When there is a remote control of engines, it is essential to have interlocks. This reduces the possibility of engine damage and any hazards to the operating personnel. Turning gear Interlock . This device prevents the engine from being started if the Turning gear is engaged. Running Direction Interlock . This prevents the fuel from being supplied if the running direction of the engine does not match the Telegraph. Starting Air Distributor in end position . This prevents starting from taking place if the shifting of the Distributor has not been completed. Main Lube. oil pressure, Piston cooling pressure, Jacket water pressure, and important parameters must be above the required minimum. Auxiliary Blower Interlock . The Auxiliary Blower is provided in case of Constant pressure turbo charging. Air Spring pressure Interlock . In case of the present generation...
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