LATEST UPDATE:  She's fine.

Abby's Blog — Entry dated Wednesday, June 9, 2010:

The wind is beginning to pick up. It is back up to 20 knots and I am expecting that by midnight tonight I could have 35-50 knots with gusts to 60 so I am off to sleep before it really picks up.

That's the end of the latest post by Abby Sunderland, a 16 year old California native, who set out to be the youngest to circumnavigate the globe by boat, solo.  It was posted from somewhere in the Indian Ocean, between Africa and Australia.

She's gone missing, and the nearest ship is 400 miles away from her last known location.

More from ABC News:

Jeff Casher, an engineer on Sunderland's support team, told ABC News that he last spoke with the 16-year-old sailor before 6 a.m. PDT, after she had been knocked down twice during the night because of strong winds — meaning that her sail had touched the water.

One of those knock-downs, Casher said, ripped the radar off the boat. She had been speaking with Casher on a satellite telephone earlier because of engine problems and was in the process of fixing those problems when she told Casher she'd call right back.

She has not been heard from since, except for the distress signals.

UPDATE:  As I was writing this, her folks just updated Abby's blog with the following (reprinted in full below the fold):

We spoke with Abby early this morning and learned that she had had a very rough day with winds up to 60 knots and seas 20-25 feet. She had been knocked down several times but was handling things well. The wind had subsided to around 35 knots which she and Wild Eyes are quite comfortable with.

We were helping her troubleshoot her engine that she was trying to start to charge her systems. Satellite phone reception was patchy. She was able to get the water out of the engine and start her up. We were waiting to hear back from her when American Search & Rescue authorities called to report having received a signal from her emergency beacon (EPIRB). We initially thought that the signal was sent automatically from her water-activated EPIRB and that it had been activated during one of her knockdowns. As we pulled the paperwork from her EPIRB registration, we learned that the signal had come from her manually activated EPIRB.

We were referred to Australian Search & Rescue and while we were on the phone with them another signal came in from her handheld PLB (Personal Locator Beacon). Her water-activated EPIRB has not been activated so we are hopeful that the boat is still upright.

We are working closely with American, French and Australian Search & Rescue authorities to coordinate several ships in the area to divert to her location. There are several ships in her area, the earliest possible contact is 40 hours. We are actively seeking out some sort of air rescue but this is difficult due to the remoteness of her location. Australian Search & Rescue have arranged to have a Quantas Airbus fly over her location at first light (she is 11 hours later). They will not be able to help her other than to talk via marine radio if they are able to get close enough. Hopefully, they will be able to assess her situation and report back to us.

Abby has all of the equipment on board to survive a crisis situation like this. She has a dry suit, survival suit, life raft, and ditch bag with emergency supplies. If she can keep warm and hang on, help will be there as soon as possible. Wild Eyes is designed for travel in the Southern Ocean and is equipped with 5 air-tight bulkheads to keep her buoyant in the event of major hull damage. It is built to Category 0 standards and is designed to self-right in the event of capsize.

Thank you for all of your kind emails and calls. We appreciate your prayers and support.

We will update as soon as there is some news.

Laurence, Marianne and Team Abby