Sony and other manufacturers offer on-camera recording units, which convert an HDV camcorder into a hybrid system capable of recording both onto tape and onto file-based media. These recorders connect to a camcorder via FireWire and do not recompress HDV video, offering exactly the same image quality as if video were recorded on tape. JVC offers two FireStore recorders made by Focus Enhancements: the HDD-based DR-HD100 and MR-HD100 on-camera recorders; it also offers the SxS-based KA-MR100G recorder. Canon offers Focus Enhancements FS-CF and FS-CF Pro models, which record onto CompactFlash memory cards. Sony offers the HDD-based HVR-DR60 and the CompactFlash-based HVR-MRC1K recorders. Recording time depends on capacity of media used. In particular, a 32 GB CompactFlash card is good for 144 minutes of HDV video. The HVR-DR60 can fit over two hours of high definition video, while the FireStore models with 100 GB disk drive can store almost four hours of footage. File-based recorders are invaluable for continuous recording that extends one hour. Use in broadcast television HDV is accepted for broadcast TV use with varying restrictions. Discovery Channel chose HDV handhelds for shooting Deadliest Catch despite their reduced light sensitivity and a large depth of focus, because smaller cameras were better for crew safety and they destroy several dozen cameras per series. HDV camcorders were also used for shooting MythBusters. In 2006 KRON San Francisco purchased 52 Sony HVR-Z1U HDV camcorders. According to chief engineer Craig Porter, the cameras proved reliable. The station formed a group of "video journalists" or "one-man bands", who would use a Z1 camcorder, Panasonic ToughBook laptop and Canopus Edius editing software to report, shoot and edit their own stories. After the station has moved to smaller cameras, it became possible for the journalists to travel in compact cars, which are 10 to 15 times cheaper than traditional large ENG vans. In February 2009 ITV News bought 68 Sony HVR-Z5E handheld camcorders for its multi-skilling journalists. The camcorders, which come with non-removable 20x lens and outfitted with CompactFlash recorders became popular among journalists who are not trained camera operators. In the TV series JAG made for CBS, handheld HDV camcorders were used for scenes where larger HD cameras would have been impractical. The BBC does not consider HDV to meet HD broadcast standards, therefore acceptability of HDV footage for HD programming is limited to 25% of the program's total duration. The Discovery HD Theater accepts