The cruise I am on actually has good equipment minus barbells or strongman implements, been walking 5 miles a day or so and often carrying a 50 pound kid
So here is the upper body cluster set workout I did, each cluster set was 5 minutes and rest 15 seconds, reps varied as noted
pec deck x 10
Seated Row x 6
lateral raise marine x 12
Straight arm pulldown x 10
Triceps pushdown x 10