Is that what people do? Book

Commodore Griimes Rim Worlds Naval Reserve on Lorn. Widower with grown childen (does not name wife or how many children). Calver in The Outsider is on his way to the Outsider. Listowel on Aerial/Flying Cloud lightjammer. Grimes and Sonya take the Faraway Quest to look for Rim Ghosts and end up trapped between dimensions where they find Earth ocean going ships, planes and people floating dead in the darkness. They find one of the early ships with people in cryovac and wake one of the Captains and with the help of one of his frozen/dreaming dowsing passengers his ship is led out of the crack in space. Grimes takes one of his dowsers onto his ship and has Mr. Mayhew his psionic officer direct the dreams and his ship also escapes but first ends up in an alternate universe because Mayhew was directing the dreamer to an idealized Lorn (this must be the universe where Captain Mitchell and his generation ship ended up) and quickly escapes and makes Mayhew do it again with another set of directions and they get back to their universe. Grimes and Sonya have paired up.