I know that 1.5 liters is not anywhere near enough water for people who are performing the labor of sailing, especially when sailing in tropical climates. The Mayo Clinic doctors think so too....
See more here.... Water: How much should you drink every day? - MayoClinic.com
I would say that the Captain/Owner should have planned for a minimum of four gallons per, day per person, plus a ten day reserve. This is a lot of water, and I know the boat would not be able to carry that much, so there is an issue from the start. I wonder why the owner of a race boat would not go with a three day sized tank and a watermaker that would fill it with a short time of running the generator or engine every day to keep it topped off? That would keep the weight lower, and help them make the passage more comfortably.
This is a long open ocean race, the boat has to finish with a healthy crew, and that includes the mental health of the crew as well, or starting the race does not make sense. You cannot finish the race in a good position if you are not performing at your peak levels, you cannot perform at peak levels if you are dehydrated. Mentally a person loses performance when dehydrated, in fact it can make you crazy, insane, doing things that are dangerous crazy.
Now I am sure there will be someone who will want to lecture us all about how open ocean racing means going without water. How having water is not a priority, and keeping your socks is too much weight, and stuff like that, which is insane. This is probably one of the long term side effects of being continually dehydrated, or perhaps just being an a$$. I personally do not understand why some people think that being dehydrated is a good thing, especially while performing the extremely strenuous labor of open ocean racing.
Apparently the folks over at the VOR agree with me on needing a watermaker, and plenty of water for the crew. In fact they seem to even be concerned about proper space, and crew comfort aboard the racing boats.
From: The Volvo Ocean 70 Explained | Sailing World
National Geographic | Volvo Ocean Race 2001-2002
I was thinking of making another comment or two about the so called expert open ocean racers who say they run the race with nearly empty tanks, but I am going to stay silent because I think that sensible parties have already come to understand that the idea of sailing thirsty is just not a good plan.