## 2 The Quick Preliminary Design Model
### Hull Forms
\begin{table}
\begin{tabular}{c c c c c c c c c c c} \hline \hline  & & \multicolumn{4}{c}{**Model 1000**} & \multicolumn{4}{c}{**Model 3000 and Model 4500**} \\ \cline{3-10}
**Group** & **Equipment** & **Description** & **Quantity** & **Utilization** & **Nominal** & **Power** & **Quantity** & **Utilization** & **Nominal** & **Power** \\  & & & **Factor, K(C)** & **Power (W)** & **Demand (W)** & **Quantity** & **Factor, K(C)** & **Power (W)** & **Demand (W)** \\ \hline  & SSS & Side Son Sonar & 2 & 100 & 12 & 24 & 2 & 100 & 12 & 24 \\  & SMP & Sub brown profiler & 1 & 100 & 150 & 150 & 1 & 100 & 150 & 150 \\  & CAM & Still image camera & 1 & 0 & 4.8 & 0 & 1 & 0 & 4.8 & 0 \\  & TUR & Turbulsky sensor & 1 & 100 & 0.9 & 0.9 & 1 & 100 & 0.9 & 0.9 \\  & MBE & Multi-beam co-board & 1 & 100 & 100 & 100 & 1 & 100 & 100 & 100 \\ \hline  & IMU & Inertial Measurement Unit & 1 & 100 & 2 & 2 & 1 & 100 & 2 & 2 \\  & CMP & Digital compass & 1 & 100 & 1 & 1 & 100 & 1 & 1 \\  & DVL,ADCP & Doppler velocity log & 1 & 100 & 1.3 & 1.3 & 1 & 100 & 1.3 & 1.3 \\  & GNSS & Multi-SSS receiver chip & 1 & 0 & 0.3 & 0 & 1 & 0 & 0.3 & 0 \\ Auxiliary & PSS & Pressure sensor & 1 & 100 & 0.4 & 0.4 & 1 & 100 & 0.4 & 0.4 \\ equipment & ALT & Alimeter & 1 & 100 & 1.5 & 1.5 & 1 & 100 & 1.5 & 1.5 \\  & STER & Servo order & 4 & 25 & 1.5 & 1.5 & 4 & 25 & 1.5 & 1.5 \\  & SVCN & Servo control & 4 & 100 & 1 & 3.8 & 4 & 100 & 1 & 3.8 \\  & USB & Underwater transponder & 1 & 0 & 57 & 0 & 1 & 0 & 57 & 0 \\  & WIFI & WiFi connection & 1 & 0 & 5 & 0 & 1 & 0 & 5 & 0 \\  & IHD & Information modern & 1 & 0 & 12 & 0 & 1 & 0 & 12 & 0 \\  & MDO & Mother board & 3 & 100 & 10.2 & 30.6 & 3 & 100 & 10.2 & 30.6 \\  & HD & Hard disk & 3 & 100 & 3.5 & 10.5 & 3 & 100 & 3.5 & 10.5 \\ \hline  & STKOCOLMP & Stack cooling pump & 1 & 100 & 48 & 48 & 2 & 75 & 48 & 72 \\  & MHOHVLV & Methanol tank height valve & 1 & 100 & 2.5 & 2.5 & 1 & 100 & 2.5 & 2.5 \\  & MCS & Methanol concentration sensor & 1 & 100 & 0.2 & 0.2 & 1 & 100 & 0.2 & 0.2 \\  & MHOHPHP & Methanol feeding pump & 1 & 100 & 9 & 9 & 1 & 100 & 9 & 9 \\  & ANOMPMP & Andre circulation pump & 1 & 100 & 5.8 & 5.8 & 1 & 100 & 5.8 & 5.8 \\  & COS-GNR & COS-G resolution & 1 & 100 & 0.8 & 0.8 & 1 & 100 & 1.2 & 1.2 \\  & COCOCO/COMP & COS-G coupling & 1 & 100 & 5.8 & 5.8 & 1 & 100 & 5.8 & 5.8 \\  & LEFFER & Low flow detection pressure regulator & 1 & 100 & 11.5 & 1.5 & 1 & 100 & 11.5 & 11.5 \\  & CATRIV & Cathode circulation follower & 1 & 100 & 0.8 & 0.8 & 1 & 100 & 0.8 & 0.8 \\  & HOPOMP & Water pump & 1 & 100 & 5.8 & 5.8 & 1 & 100 & 5.8 & 5.8 \\  & CATJWWVLV & 3-way valves & 4 & 50 & 11 & 22 & 4 & 50 & 11 & 22 \\  & ANOCTRVIV & Anode inlet control valve & 0 & 0 & 0 & 0 & 2 & 0 & 11 & 0 \\  & DCTOGV & DC/DC converter 24 to 3.3V & 1 & - & - & 1.3 & 1 & - & - & 1.3 \\  & DCTOGV & DC/DC converter 24 to 5.5V & 2 & - & - & 1.3 & 2 & - & - & 1.3 \\  & DCTOGV & DC/DC converter 24 to 12 V & 2 & - & -1 & 7.0 & 2 & - & - & 1.7 \\ \hline  & & Power margin (W) & 22.5 & \multicolumn{2}{c}{Power margin (W)} & 23.7 \\ \cline{3-10}  & & \multicolumn{4}{c}{_Total power demand (W)_} & 472.9 & \multicolumn{4}{c}{_Total power demand (W)_} & 498.5 \\ \hline \hline \end{tabular}  
* Converters power demand depends on their efficiency and the load they are subjected to.  
\end{table} 
Table 3: Operational profile for a cruising speed of 2.058 m/s (4 knots). Power margin, \(5\%\). Because both periods of the operational profile studied here are equal only the configuration of one of them is shown.