Jekon Edness (36*) and Chris Douglas (14*) had added 32 runs for the second wicket before rain forced a premature end to day's play. Openers Edness and Oronde Bascome (36) laid the solid foundation with a 59-run stand for opening wicket.
Earlier, Namibia, resuming at the overnight score of 280/9, added another 40 runs, thanks largely to the 56-run last wicket stand by Sarel Burger (86) and Louis Klazinga.
Burger, who resumed the day on 71, was the last batsman out when he was caught by Lionel Cann off left-arm spinner Dwayne Leverock (3/88) for a neatly crafted 86. His 281-ball knock included five fours.
Klazinga contributed an invalubale 30 off 74 balls.
The ICC Intercontinental Cup has quickly grown in stature and profile since its inception four years ago and now the ICC"s premier first-class tournament is an integral part of the Associate Members' cricket schedule.
Having previously been designed around a two-group, three-day format, the event has evolved into an eight-team, round-robin and truly global tournament featuring four-day cricket which gives those teams who do not play Test cricket the chance to experience the longer form of the game.
Scotland won the inaugural ICC Intercontinental Cup in 2004, beating Canada in the final, while Ireland has been victorious in both events since then, beating Kenya in the 2005 decider and Canada in the 2006-07 event.
Namibia Ist innings 320 all out (Sarel Burger 86, Snyman 58, Jan-Berrie Burger 42, Louis Klazinga; Dwayne Leverock 3/48, Stephen Kelly 2/68, Trott 2/58, Borden 2/56) Vs Bermuda 91/1 (Jekon Edness 36 n o, Bascome 36, Chris Douglas 14 n o).