Apr 2007
Easter in Malta & Water Systems
15/04/07 19:45
Back on board Two-Step in time for Easter! Malta
celebrates Easter in a big way with processions in
the streets and it was excellent!! Against a great
backdrop of the most amazing fortified city of
Valletta we filmed men carrying very heavy statues
and dressed in costumes from the Easter story – quite
moving!
Now we are working on Two-Step – getting her ready for sale – or sail! Two-Step is up for sale of course (see web link where I have added more pictures showing the cabins in more detail). The plan is to sail her up to England leaving in 2 weeks (first of May) since that is where our new boat is being built. So anyone interested in a Med Cruise and looking for a super cruising boat handily prelocated in the Med and ready to go – should let us know immediately. Otherwise we will be sailing her further west.
SOOOO – if you want to turn your dreams of a Mediterranean Summer cruise into reality!! Come on over to Malta and hop aboard Two-Step – fully equipped and ready to go – we will spend a week or two with you as you like to get familiar with her and even help reposition her to Greece or Turkey – our personal recommendations for the some of the best cruising in the world!! Contact us for more information!
And now, back to our regularly scheduled blog...
Water Budget and Systems – Continued
Actually I have never seen anyone attempt to do an actual budget for water use. I do remember years ago ready cruising books recommending average use for a boat in a long passage and saying to allow 4 litres per person per day. But I think modern boats tend to use more (or much more!!) so designing a system to allow us to safely cross oceans is going to take into account more than that simple rule of thumb.
Assumptions:
1. We will have a watermaker
2. The watermaker might stop working partway through a passage
3. Pressure water system might also either stop working, or use too much water
4. We will have a system that safely crosses oceans even assuming 1,2 & 3.
Watermaker – In order to be able to run the watermaker in the most different situations I believe the 12 volt ones are the best. Then even if the inverter/generators pack up, you can still run it from the battery or solar panel. We are looking at Spectra watermakers at this point.
Pressure Water – In my experience a pressure water system encourages sailors to use too much water. If there was ever a problem with the watermaker, it would be extremely difficult to conserve water, so I am planning to install the ubiquitous Whale foot pumps in the heads and galley. This way if the pressure system goes down we can still get at our water, and on passage we can conserve water easily. And for anyone who hasn't used a Whale footpump – they really are excellent. Did I mention that I have known cruisers who retired ashore and were planning to install these footpumps in their houses?!
Water tanks – The Southerly 42 has two water tanks. Total capacity is actually slightly less than Two-Steps water tanks – although you can order an optional tank to increase it. It think we will stick with the original tankage plan, add the watermaker and try to keep the tanks filled up on passages.
Water safety on Passage – My plan is to regularly refill the tanks from the watermaker whenever we are in a remote cruising ground or are on passage. For instance, plan to run the watermaker when we have used one third of our water. That way if the watermaker stops working one day, we will still have a 2/3 full tanks. It will not be a disaster! We will immediately switch into conservation mode – no more showers, use footpumps etc and the 2/3 capacity will be plenty to allow us to reach port safely or fix whatever the problem is.
Watermaker usage – One of the changes I have noticed in the years we have been cruising is that more and more cruisers use their watermakers all the time. Originally when we met a cruiser with a watermaker they used it primarily on passages or in remote areas like the Bahamas where water is expensive. But in port where water was easily available on the dock, they would use that to fill their tanks. Now more people seem to run them all the time. And in many cases I understand the rationale. For instance, here in Malta, the municipal water is quite safe to drink, but a little brackish (salty). So tea tastes a bit crumby, and we choose to drink bottled water. So cruisers who have a watermaker, will often choose to run that when they need to fill their tanks. The issue is that you have to be very careful about the filters you have in the system. It is often an option to have a water/oil separator as a preliminary filter before it is safe to take in harbour water. The other option is to run the municipal tap water as the input to the watermaker – in this case you would need more plumbing to connect the hose, and a very good chlorine filter to make sure the chlorine in the city water didn't damage the membrane in the watermaker. I would like more information on this option and will ask around here to find someone who has it all sorted out.
Well, thats it for today, for the past couple of weeks I have been working on designs for a stern arch to act as dinghy davits/solar panel mount and a bimini. I will see if I can post these drawings for the next blog entry this week!
Ciao!
Now we are working on Two-Step – getting her ready for sale – or sail! Two-Step is up for sale of course (see web link where I have added more pictures showing the cabins in more detail). The plan is to sail her up to England leaving in 2 weeks (first of May) since that is where our new boat is being built. So anyone interested in a Med Cruise and looking for a super cruising boat handily prelocated in the Med and ready to go – should let us know immediately. Otherwise we will be sailing her further west.
SOOOO – if you want to turn your dreams of a Mediterranean Summer cruise into reality!! Come on over to Malta and hop aboard Two-Step – fully equipped and ready to go – we will spend a week or two with you as you like to get familiar with her and even help reposition her to Greece or Turkey – our personal recommendations for the some of the best cruising in the world!! Contact us for more information!
And now, back to our regularly scheduled blog...
Water Budget and Systems – Continued
Actually I have never seen anyone attempt to do an actual budget for water use. I do remember years ago ready cruising books recommending average use for a boat in a long passage and saying to allow 4 litres per person per day. But I think modern boats tend to use more (or much more!!) so designing a system to allow us to safely cross oceans is going to take into account more than that simple rule of thumb.
Assumptions:
1. We will have a watermaker
2. The watermaker might stop working partway through a passage
3. Pressure water system might also either stop working, or use too much water
4. We will have a system that safely crosses oceans even assuming 1,2 & 3.
Watermaker – In order to be able to run the watermaker in the most different situations I believe the 12 volt ones are the best. Then even if the inverter/generators pack up, you can still run it from the battery or solar panel. We are looking at Spectra watermakers at this point.
Pressure Water – In my experience a pressure water system encourages sailors to use too much water. If there was ever a problem with the watermaker, it would be extremely difficult to conserve water, so I am planning to install the ubiquitous Whale foot pumps in the heads and galley. This way if the pressure system goes down we can still get at our water, and on passage we can conserve water easily. And for anyone who hasn't used a Whale footpump – they really are excellent. Did I mention that I have known cruisers who retired ashore and were planning to install these footpumps in their houses?!
Water tanks – The Southerly 42 has two water tanks. Total capacity is actually slightly less than Two-Steps water tanks – although you can order an optional tank to increase it. It think we will stick with the original tankage plan, add the watermaker and try to keep the tanks filled up on passages.
Water safety on Passage – My plan is to regularly refill the tanks from the watermaker whenever we are in a remote cruising ground or are on passage. For instance, plan to run the watermaker when we have used one third of our water. That way if the watermaker stops working one day, we will still have a 2/3 full tanks. It will not be a disaster! We will immediately switch into conservation mode – no more showers, use footpumps etc and the 2/3 capacity will be plenty to allow us to reach port safely or fix whatever the problem is.
Watermaker usage – One of the changes I have noticed in the years we have been cruising is that more and more cruisers use their watermakers all the time. Originally when we met a cruiser with a watermaker they used it primarily on passages or in remote areas like the Bahamas where water is expensive. But in port where water was easily available on the dock, they would use that to fill their tanks. Now more people seem to run them all the time. And in many cases I understand the rationale. For instance, here in Malta, the municipal water is quite safe to drink, but a little brackish (salty). So tea tastes a bit crumby, and we choose to drink bottled water. So cruisers who have a watermaker, will often choose to run that when they need to fill their tanks. The issue is that you have to be very careful about the filters you have in the system. It is often an option to have a water/oil separator as a preliminary filter before it is safe to take in harbour water. The other option is to run the municipal tap water as the input to the watermaker – in this case you would need more plumbing to connect the hose, and a very good chlorine filter to make sure the chlorine in the city water didn't damage the membrane in the watermaker. I would like more information on this option and will ask around here to find someone who has it all sorted out.
Well, thats it for today, for the past couple of weeks I have been working on designs for a stern arch to act as dinghy davits/solar panel mount and a bimini. I will see if I can post these drawings for the next blog entry this week!
Ciao!
Water Budget and Planning
02/04/07 19:43
What a wonderful 3 weeks we have had in the Virgin
Islands!!! First 2 weeks cruising on our friends
“Diesel Duck” - a 42 foot motor sailor immaculately
fitted out in Cherry with all the best equipment.
Benno and Marlene have been cruising before on a 37
foot steel sloop and decided for their next cruise
they would like a power boat. So they built the
Diesel Duck and have now sailed from Canada down to
the Caribbean as far as Venezuela. We met them in St
Thomas USVI and had a great 2 weeks cruising the
USVI, over to Culebra and then back upwind to the
BVI. It was especially nice to have a chance to try
out and live with modern hi-tech equipment, some of
which we are planning on installing on the new boat.
With an 800amp-hour battery bank, and large inverter,
watermaker, washer-dryer and a diesel generator,
Diesel Duck gave us first hand experience of managing
water and electricity on a modern well equipped
cruiser. We were filming for “Distant Shores” of
course, and the weather was great. Thanks guys!!
Water Budget
The first thing I learned was just how much water a modern cruising boat could use. On Two-Step we have only foot-pumps for the water – no pressurised system. And no real shower. So our four 80 litre water tanks will last us 2 weeks or more with the two of us on board. But a modern boat with pressure water tends to use more. It is just not possible to wash your hands of brush your teeth with as little water as we use with our foot pump. Similarly washing dishes tends to use more when you have a regular tap. One of the biggest factors is water supply. On Two-Step, we do not have a watermaker. So an ocean crossing passage of 21 days (our longest to date) means we have to make our 320 litres last that long. For anyone planning ocean passages, note that you must budget your water for as long as you might be out there. We usually add a 50 percent safety factor to our voyage planning when we are provisioning. So our Atlantic Crossing to Brazil of 2200 miles was planned to be at sea for an entire month. We had enough food for that, and planned the water for that as well. Since we have four tanks, we know we shouldn't finish more than one per week.
Anyway, the net result of this is that long ago we learnt we could make do with just 80 litres of water a week for the two of us. Sun shower and sponge baths, washing dishes in salt water, and using foot pumps to help conserve.
Enter the modern cruising boat!! I read in a cruising magazine not so long ago that you could budget 25 gallons per person per day!!!! Are they talking about life on a cruising boat of on the QE2 I thought? Well, it turns out that if you have all the gadgets you just might (although 25 gallons might still be too much even for those who leave the water running while they brush their teeth).
Water Budget Factors
* Toilets – some modern marine toilets hook up to the fresh water to flush. If you have these on your boat then factor in 3 litres per flush. Possibly 20 litres per person per day.
* Showers – a modern shower can use quite a lot of water. Its a great luxury to have a shower on board, and many cruisers have them. If used frugally they may use just 10 litres per shower or even less if you instruct crew to turn it off while soaping up. I haven't done clinical tests but I imagine a wasteful shower head just left on all the time would use more than 20 litres in a long shower.
* Pressure water syndrome – probably the most insidious – PWS (pressure water syndrome) affects people by encouraging them to just leave the water running. Where campers and old-time sailors know its easy to brush your teeth in just 1 cup of water, modern city dwellers afflicted with PWS can use 10-20 times as much. Choosing a faucet that is easy to turn on and off can help somewhat. And instructing the crew can help too.
* Watermakers – For the new boat I am looking at a watermaker that will produce 24 litres per hour. To supply our modest needs on Two-Step, this would only need to run one hour every two days. Even when we are more careless and use water more casually we would still only need to use it for 1 hour a day. The factor seems to be you will use more since you know you have it! Cruisers I have spoken with who have watermakers, all said they wanted one so they wouldn't have to worry about water use. So add a factor of 2-times if you are in this category. Just remember that nothing is free. Running a watermaker for twice as long as you need, will use twice the power. It also might be noisy. Check out the sound of a potential watermaker before you buy. Many people recommend you plan a watermaker to supply your water needs by running in the time you will be running your engine or generator to charge the batteries. The rational here is that watermakers use a fair bit of power, so you will want to run the generator or engine at the same time. So a watermaker that is too small will need to run for hours. The alternative is a smaller watermaker that you might be able to run during times your solar or wind generator is producing surplus power. But more on power generation later...
See you next time – in the Med when we are back aboard Two-Step in Malta for Easter.
Water Budget
The first thing I learned was just how much water a modern cruising boat could use. On Two-Step we have only foot-pumps for the water – no pressurised system. And no real shower. So our four 80 litre water tanks will last us 2 weeks or more with the two of us on board. But a modern boat with pressure water tends to use more. It is just not possible to wash your hands of brush your teeth with as little water as we use with our foot pump. Similarly washing dishes tends to use more when you have a regular tap. One of the biggest factors is water supply. On Two-Step, we do not have a watermaker. So an ocean crossing passage of 21 days (our longest to date) means we have to make our 320 litres last that long. For anyone planning ocean passages, note that you must budget your water for as long as you might be out there. We usually add a 50 percent safety factor to our voyage planning when we are provisioning. So our Atlantic Crossing to Brazil of 2200 miles was planned to be at sea for an entire month. We had enough food for that, and planned the water for that as well. Since we have four tanks, we know we shouldn't finish more than one per week.
Anyway, the net result of this is that long ago we learnt we could make do with just 80 litres of water a week for the two of us. Sun shower and sponge baths, washing dishes in salt water, and using foot pumps to help conserve.
Enter the modern cruising boat!! I read in a cruising magazine not so long ago that you could budget 25 gallons per person per day!!!! Are they talking about life on a cruising boat of on the QE2 I thought? Well, it turns out that if you have all the gadgets you just might (although 25 gallons might still be too much even for those who leave the water running while they brush their teeth).
Water Budget Factors
* Toilets – some modern marine toilets hook up to the fresh water to flush. If you have these on your boat then factor in 3 litres per flush. Possibly 20 litres per person per day.
* Showers – a modern shower can use quite a lot of water. Its a great luxury to have a shower on board, and many cruisers have them. If used frugally they may use just 10 litres per shower or even less if you instruct crew to turn it off while soaping up. I haven't done clinical tests but I imagine a wasteful shower head just left on all the time would use more than 20 litres in a long shower.
* Pressure water syndrome – probably the most insidious – PWS (pressure water syndrome) affects people by encouraging them to just leave the water running. Where campers and old-time sailors know its easy to brush your teeth in just 1 cup of water, modern city dwellers afflicted with PWS can use 10-20 times as much. Choosing a faucet that is easy to turn on and off can help somewhat. And instructing the crew can help too.
* Watermakers – For the new boat I am looking at a watermaker that will produce 24 litres per hour. To supply our modest needs on Two-Step, this would only need to run one hour every two days. Even when we are more careless and use water more casually we would still only need to use it for 1 hour a day. The factor seems to be you will use more since you know you have it! Cruisers I have spoken with who have watermakers, all said they wanted one so they wouldn't have to worry about water use. So add a factor of 2-times if you are in this category. Just remember that nothing is free. Running a watermaker for twice as long as you need, will use twice the power. It also might be noisy. Check out the sound of a potential watermaker before you buy. Many people recommend you plan a watermaker to supply your water needs by running in the time you will be running your engine or generator to charge the batteries. The rational here is that watermakers use a fair bit of power, so you will want to run the generator or engine at the same time. So a watermaker that is too small will need to run for hours. The alternative is a smaller watermaker that you might be able to run during times your solar or wind generator is producing surplus power. But more on power generation later...
See you next time – in the Med when we are back aboard Two-Step in Malta for Easter.