0, 0, /* reserved */
0, 0, /* user specified altitude */
2, /* alt hold mode (disabled, require 3d fixes) */
0, /* alt hold source (use last computed altitude) */
0, /* reserved */
0, 0, /* reserved */
0, 0, /* user specified altitude */
2, /* alt hold mode (disabled, require 3d fixes) */
0, /* alt hold source (use last computed altitude) */
0, /* reserved */