Our cell phones and modem connections can transmit 4800 bits per second. When set to collect data every five minutes, a station collects 288 lines of data in one day. One hundred centimeters equals one meter. To supply power to the stations they can be plugged into an electrical outlet only if they are less than 5,000 meters from the HMDC main building. If they are farther away they will need to use solar panels to supply the electrcity.
Salinity is a good parameter to characterize water at a given spot.
A salinity measure of 10 ppt means that there is one part of salt for every 1000 parts of solution. The amount of dissolved oxygen in the water is important to animals and plants that live in the water. A dissolved oxygen concentration of 10 ppm means that in the water there are 10 parts of oxygen for every 1.000.000 parts of solution. Sensitive fish need at least 5 ppm of dissolved oxygen to survive in water.